[Footnote 1: Cf. on Bayle, L. Feuerbach. 1838, 2d ed., 1844; Eucken in the Allgemeine Zeitung, supplement to Nos. 251, 252, October 27, 28, 1891.]

[Footnote 2: Thus, in regard to the problem of freedom, he finds it hard to comprehend how the creatures, who are not the authors of their own existence, can be the authors of their own actions, but, at the same time, inadmissible to think of God as the cause of evil. He seeks only to show the indemonstrability and incomprehensibility of freedom, not to reject it. For he sees in it the condition of morality, and calls attention to the fact that the difficulties in which those who deny freedom involve themselves are far greater than those of their opponents. He shows himself entirely averse to the determinism and pantheism of Spinoza.]

He who seeks to refute skepticism must produce a criterion of truth. If such exists, it is certainly that advanced by Descartes, the evidence, the evident clearness of a principle. Well, then, the following principles pass for evident: That one, who does not exist, can have no responsibility for an evil action; that two things, which are identical with the same thing, are identical with each other; that I am the same man to-day that I was yesterday. Now, the revealed doctrines of original sin and of the Trinity show that the first and second of these axioms are false, and the Church doctrine of the preservation of the world as a continuous creation, that the last principle is uncertain. Thus if not even self-evidence furnishes us a criterion of truth, we must conclude that none whatever exists. Further, in regard to the origin of the world from a single principle, its creation by God, we find this supported, no doubt, both by the conclusions of the pure reason and by the consideration of nature, but controvened by the fact of evil, by the misery and wickedness of man. Is it conceivable that a holy and benevolent God has created so unhappy and wicked a being?

Bayle's motives in defending faith against reason were, on the one hand, his personal piety, on the other, his conviction of the unassailable purity of Christian ethics. All the sects agree in regard to moral principles, and it is this which assures us of the divinity of the Christian revelation. Nevertheless, he does not conceal from himself the fact that possession of the theoretical side of religion is far from being a guarantee of practice in conformity with her precepts. It is neither true that faith alone leads to morality nor that unbelief is the cause of immorality. A state composed of atheists would be not at all impossible, if only strict punishments and strict notions of honor were insisted upon.

The judgments of the natural reason in moral questions are as certain and free from error as its capacity is shown to be weak and limited in theoretical science. The idea of morality never deceives anyone; the moral law is innate in every man. Although Christianity has given the best development of our duties, yet the moral law can be understood and followed by all men, even by heathen and atheists. We do not need to be Christians in order to act virtuously; the knowledge given by conscience is not dependent upon revelation. From the knowledge of the good to the practice of it is, it is true, a long step; we may be convinced of moral truth without loving it, and God's grace alone is able to strengthen us against the power of the passions, by adding to the illumination of the mind an inclination of the heart toward the good. Temperament, custom, self-love move the soul more strongly than general truths. As in life pleasure is far outbalanced by pain and vexation, so far more evil acts are done than good ones: history is a collection of misdeeds, with scarcely one virtuous act for a thousand crimes. It is not the external action that constitutes the ethical character of a deed, but the motive or disposition; almsgiving from motives of pride is a vice, and only when practiced out of love to one's neighbors, a virtue. God looks only at the act of the will; our highest duty, and one which admits of no exceptions, is never to act contrary to conscience.



CHAPTER IV.

LOCKE.

After the Cartesian philosophy had given decisive expression to the tendencies of modern thought, and had been developed through occasionalism to its completion in the system of Spinoza, the line of further progress consisted in two factors: Descartes's principles—one-sidedly rationalistic and abstractly scientific, as they were—were, on the one hand, to be supplemented by the addition of the empirical element which Descartes had neglected, and, on the other, to be made available for general culture by approximation to the interests of practical life. England, with its freer and happier political conditions, was the best place for the accomplishment of both ends, and Locke, a typically healthy and sober English thinker, with a distaste for extreme views, the best adapted mind. Descartes, the rationalist, had despised experience, and Bacon, the empiricist, had despised mathematics; but Locke aims to show that while the reason is the instrument of science, demonstration its form, and the realm of knowledge wider than experience, yet this instrument and this form are dependent for their content on a supply of material from the senses. The emphasis, it is true, falls chiefly on the latter half of this programme, and posterity, especially, has almost exclusively attended to the empirical side of Locke's theory of knowledge in giving judgment concerning it.

John Locke was born at Wrington, not far from Bristol, in 1632. At Oxford he busied himself with philosophy, natural science, and medicine, being repelled by the Scholastic thinkers, but strongly attracted by the writings of Descartes. In 1665 he became secretary to the English ambassador to the Court of Brandenburg. Returning thence to Oxford he made the acquaintance of Lord Anthony Ashley (from 1672 Earl of Shaftesbury; died in Holland 1683), who received him into his own household as a friend, physician, and tutor to his son (the father of Shaftesbury, the moral philosopher), and with whose varying fortunes Locke's own were henceforth to be intimately connected. Twice he became secretary to his patron (once in 1667—with an official secretaryship in 1672, when Shaftesbury became Lord Chancellor—and again in 1679, when he became President of the Council), but both times he lost his post on his friend's fall. The years 1675-79 were spent in Montpellier and Paris. In 1683 he went into voluntary exile in Holland (where Shaftesbury had died in January of the same year), and remained there until 1689, when the ascension of the throne by William of Orange made it possible for him to return to England. Here he was made Commissioner of Appeals, and, subsequently, one of the Commissioners of Trade and Plantations (till 1700). He died in 1704 at Gates, in Essex, at the house of Sir Francis Masham, whose wife was the daughter of Cudworth, the philosopher.

Locke's chief work, An Essay concerning Human Understanding, which had been planned as early as 1670, was published in 1689-90, a short abstract of it having previously appeared in French in Le Clerc's Bibliotheque Universelle, 1688. His theoretical works include, further, the two posthumous treatises, On the Conduct of the Understanding (originally intended for incorporation in the fourth edition of the Essay, which, however, appeared in 1700 without this chapter, which probably had proved too extended) and the Elements of Natural Philosophy. To political and politico-economic questions Locke contributed the two Treatises on Government, 1690, and three essays on money and the coinage. In the year 1689 appeared the first of three Letters on Tolerance, followed, in 1693, by Some Thoughts on Education, and, in 1695, by The Reasonableness of Christianity as delivered in the Scriptures. The collected works appeared for the first time in 1714, and in nine volumes in 1853; the philosophical works (edited by St. John) are given in Bonn's Standard Library (1867-68).[1]

[Footnote 1: Lord King and Fox Bourne have written on Locke's life, 1829 and 1876. A comparison of Locke's theory of knowledge with Leibnitz's critique was published by Hartenstein in 1865, and one by Von Benoit (prize dissertation) in 1869, and an exposition of his theory of substance by De Fries in 1879. Victor Cousin's Philosophie de Locke has passed through six editions. [Among more recent English discussions reference may be made to Green's Introduction to Hume's Treatise on Human Nature, 1874 (new ed. 1890), which is a valuable critique of the line of development, Locke, Berkeley, Hume; Fowler's Locke, in the English Men of Letters, 1880; and Fraser's Locke, in Blackwood's Philosophical Classics, 1890.—TR.]]

%(a) Theory of Knowledge.%—Locke's theory of knowledge is controlled by two tendencies, one native, furnished by the Baconian empiricism, and the other Continental, supplied by the Cartesian question concerning the origin of ideas. Bacon had demanded the closest connection with experience as the condition of fruitful inquiry. Locke supports this commendation of experience by a detailed description of the services which it renders to cognition, namely, by showing that, in simple ideas, perception supplies the material for complex ideas, and for all the cognitive work of the understanding. Descartes had divided ideas, according to their origin, into three classes: those which are self-formed, those which come from without, and those which are innate (p. 79), and had called this third class the most valuable. Locke disputes the existence of ideas in the understanding from birth, and makes it receive the elements of knowledge from the senses, that is, from without. He is a representative of sensationalism,—not in the stricter sense, first put into the term by those who subsequently continued his endeavors, that thought arises from perception, that it is transformed sensation—but in the wider sense, that thought is (free) operation with ideas, which are neither created by it nor present in it from the first, but given to it by perception, that, consequently, the cognitive process begins with sensation and so its first attitude is a passive one. From the standpoint of the Cartesian problem, which he solves in a sense opposite to Descartes, Locke supplements the empiricism of Bacon by basing it on a psychologically developed theory of knowledge. That in the course of the inquiry he introduces a new principle, which causes him to diverge from the true empirical path, will appear in the sequel.

The question "How our ideas come into the mind" receives a negative answer (in the first book of the Essay): "There are no innate principles in the mind"[1] The doctrine of the innate character of certain principles is based on their universal acceptance. The asserted agreement of mankind in regard to the laws of thought, the principles of morality, the existence of God, etc., is neither cogent as an argument nor correct in fact. In the first place, even if there were any principles which everyone assented to, this would not prove that they had been created in the soul; the fact of general consent would admit of a different explanation. Granted that no atheists existed, yet it would not necessarily follow that the universal conviction of the existence of God is innate, for it might have been gradually reached in each case through the use of the reason—might have been inferred, for instance, from the perception of the purposive character of the world. Second, the fact to which this theory of innate ideas appeals is not true. No moral rule can be cited which is respected by all nations. The idea of identity is entirely unknown to idiots and to children. If the laws of identity and contradiction were innate they must appear in consciousness prior to all other truths; but long before a child is conscious of the proposition "It is impossible for the same thing to be and not to be," it knows that sweet is not bitter, and that black is not white. The ideas first known are not general axioms and abstract concepts, but particular impressions of the senses. Would nature write so illegible a hand that the mind must wait a long time before becoming able to read what had been inscribed upon it? It is often said, however, that innate ideas and principles may be obscured and, finally, completely extinguished by habit, education, and other extrinsic circumstances. Then, if they gradually become corrupted and disappear, they must at least be discoverable in full purity where these disturbing influences have not yet acted; but it is especially vain to look for them in children and the ignorant. Perhaps, however, these possess such principles unconsciously; perhaps they are imprinted on the understanding, without being attended to? This would be a contradiction in terms. To be in the mind or the understanding simply means "to be understood" or to be known; no one can have an idea without being conscious of it. Finally, if the attempt be made to explain "originally in the mind" in so wide a sense that it would include all truths which man can ever attain or is capable of discovering by the right use of reason, this would make not only all mathematical principles, but all knowledge in general, all sciences, and all arts innate; there would be no ground even for the exclusion of wisdom and virtue. Therefore, either all ideas are innate or none are. This is an important alternative. While Locke decides for the second half of the proposition, Leibnitz defends the first by a delicate application of the concept of unconscious representation and of implicit knowledge, which his predecessor rejects out of hand.

[Footnote 1: According to Fox Bourne this first book was written after the others. Geil (Ueber die Abhaengigkeit Lockes von Descartes, Strassburg, 1887, chap, iii.) has endeavored to prove that, since the arguments controverted are wanting in Descartes, the attack was not aimed at Descartes and his school, but at native defenders of innate ideas, as Lord Herbert of Cherbury and the English Platonists (Cudworth, More, Parker, Gale). That along with these the Cartesian doctrine was a second and chief object of attack is shown by Benno Erdmann in his discussion of the treatises by G. Geil and R. Sommer (Lockes Verhaeltnis zu Descartes, Berlin, 1887) in the Archiv fuer Geschichte der Philosophie, ii, pp. 99-121.]

Locke's positive answer to the question concerning the origin of ideas is given in his second book. Ideas are not present in the understanding from the beginning, nor are they originated by the understanding, but received through sensation. The understanding is like a piece of white paper on which perception inscribes its characters. All knowledge arises in experience. This is of two kinds, derived either from the external senses or the internal sense. The perception of external objects is termed Sensation, that of internal phenomena (of the states of the mind itself) Reflection. External and internal perception are the only windows through which the light of ideas penetrates into the dark chamber of the understanding. The two are not opened simultaneously, however, but one after the other; since the perceptions of the sensible qualities of bodies, unlike that of the operations of the mind itself, do not require an effort of attention, they are the earlier. The child receives ideas of sensation before those of reflection; internal perception presupposes external perception.

In this distinction between sensation and reflection, we may recognize an after-effect of the Cartesian dualism between matter and spirit. The antithesis of substances has become a duality in the faculties of perception. But while Descartes had so far forth ascribed precedence to the mind in that he held the self-certitude of the ego to be the highest and clearest of all truths and the soul to be better known than the body, in Locke the relation of the two was reversed, since he made the perception of self dependent on the precedent perception of external objects. This antithesis was made still sharper in later thinking, when Condillac made full use of the priority of sensation, which in Locke had remained without much effect; while Berkeley, on the other hand, reduced external perception to internal perception.

All original ideas are representations either of the external senses or of the internal sense, or of both. And since, in the case of ideas of sensation, there is a distinction between those which are perceived by a single one of the external senses and those which come from more than one, four classes of simple ideas result: (1) Those which come from one external sense, as colors, sounds, tastes, odors, heat, solidity, and the like. (2) Those which come from more than one external sense (sight and touch), as extension, figure, and motion. (3) Reflection on the operations of our minds yields ideas of perception or thinking (with its various modes, remembrance, judging, knowledge, faith, etc.), and of volition or willing. (4) From both external and internal perception there come into the mind the ideas of pleasure and pain, existence, power, unity, and succession. These are approximately our original ideas, which are related to knowledge as the letters to written discourse; as all Homer is composed out of only twenty-four letters, so these few simple ideas constitute all the material of knowledge. The mind can neither have more nor other simple ideas than those which are furnished to it by these two sources of experience.

Locke differs from Descartes again in regard to extension and thought. Extension does not constitute the essence of matter, nor thought the essence of mind. Extension and body are not the same; the former is presupposed by the latter as its necessary condition, but it is the former alone which yields mathematical matter. The essence of physical matter consists rather in solidity: where impenetrability is found there is body, and the converse; the two are absolutely inseparable. With space the case is different. I cannot conceive unextended matter, indeed, but I can easily conceive immaterial extension, an unfilled space Further, if the essence of the soul consisted in thought, it must be always thinking. As the Cartesians maintained, it must have ideas as soon as it begins to be, which is manifestly contrary to experience. Thinking is merely an activity of the mind, as motion is an activity of the body, and not its essential characteristic. The mind does not receive ideas until external objects occasion perception in it through impressions, which it is not able to avert. The understanding may be compared to a mirror, which, without independent activity and without being consulted, takes up the images of things. Some of the simple ideas which have been mentioned above represent the properties of things as they really are, others not. The former class includes all ideas of reflection (for we are ourselves the immediate object of the inner sense); but among the ideas of sensation those only which come from different senses, hence extension, motion and rest, number, figure, and, further, solidity, are to be accounted primary qualities, i. e., such as are actual copies of the properties of bodies. All other ideas, on the contrary, have no resemblance to properties of bodies; they represent merely the ways in which things act, and are not copies of things. The ideas of secondary or derivative qualities (hard and soft, warm and cold, colors and sounds, tastes and odors) are in the last analysis caused—as are the primary—by motion, but not perceived as such. Yellow and warm are merely sensations in us, which we erroneously ascribe to objects; with equal right we might ascribe to fire, as qualities inherent in it, the changes in form and color which it produces in wax and the pain which it causes in the finger brought into proximity with it. The warmth and the brightness of the blaze, the redness, the pleasant taste, and the aromatic odor of the strawberry, exist in these bodies merely as the power to produce such sensations in us by stimulation of the skin, the eye, the palate, and the nose. If we remove the perceptions of them, they disappear as such, and their causes alone remain—the bulk, figure, number, texture, and motion of the insensible particles. The ground of the illusion lies in the fact that such qualities as color, etc., bear no resemblance to their causes, in no wise point to these, and in themselves contain naught of bulk, density, figure, and motion, and that our senses are too weak to discover the material particles and their primary qualities.—The distinction between qualities of the first and second order—first advanced by the ancient atomists, revived by Galileo and Descartes on the threshold of the modern period, retained by Locke, and still customary in the natural science of the day—forms an important link in the transition from the popular view of all sense-qualities as properties of things in themselves to Kant's position, that spatial and temporal qualities also belong to phenomena alone, and are based merely on man's subjective mode of apprehension, while the real properties of things in themselves are unknowable.

Thus far the procedure of the understanding has been purely passive. But besides the capacity for passively receiving simple ideas, it possesses the further power of variously combining and extending these original ideas which have come into it from without, of working over the material given in sensation by the combination, relation, and separation of its various elements. In this it is active, but not creative. It is not able to form new simple ideas (and just as little to destroy such as already exist), but only freely to combine the elements furnished without its assistance by perception (or, following the figure mentioned above, to combine into syllables and words the separate letters of sensation). Complex ideas arise from simple ideas through voluntary combination of the latter.

Perception is the first step toward knowledge. After perception the most indispensable faculty is retention, the prolonged consciousness of present ideas and the revival of those which have disappeared, or, as it were, have been put aside. For an idea to be "in the memory" means that the mind has the capacity to reproduce it at will, whereupon it recognizes it as previously experienced. If our ideas are not freshened up from time to time by new impressions of the same sort they gradually fade out, until finally (as the idea of color in one become blind in early life) they completely disappear. Ideas impressed upon the mind by frequent repetition are rarely entirely lost. Memory is the basis for the intellectual functions of discernment and comparison, of composition, abstraction, and naming. Since, amid the innumerable multitude of ideas, it is not possible to assign to each one a definite sign, the indispensable condition of language is found in the power of abstraction, that is, in the power of generalizing ideas, of compounding many ideas into one, and of indicating by the names of the general ideas, or of the classes and species, the particular ideas also which are contained under these. Here is the great distinction between man and the brute. The brute lacks language because he lacks (not all understanding whatever, e.g., not a capacity, though an imperfect one, of comparison and composition, but) the faculty of abstraction and of forming general ideas. The object of language is simply the quick and easy communication of our thoughts to others, not to give expression to the real essence of objects. Words are not names for particular things, but signs of general ideas; and abstracta nothing more than an artifice for facilitating intellectual intercourse. This abbreviation, which aids in the exchange of ideas, involves the danger that the creations of the mind denoted by words will be taken for images of real general essences, of which, in fact, there are none in existence, but only particular things. In order to prevent anyone to whom I am speaking from understanding my words in a different sense from the one intended, it is necessary for me to define the complex ideas by analyzing them into their elements, and, on the other hand, to give examples in experience of the simple ideas, which do not admit of definition, or to explain them by synonyms. Thus much from Locke's philosophy of language, to which he devotes the third book of the Essay.

Complex ideas, which are very numerous, may be divided into three classes: Modes, Substances, and Relations.

Modes (states, conditions) are such combinations of simple ideas which do not "contain in them the supposition of subsisting by themselves, but are considered as dependencies on, or affections of substances." They fall into two classes according as they are composed of the same simple ideas, or simple ideas of various kinds; the former are called simple, the latter mixed, modes. Under the former class belong, for example, a dozen or a score, the idea of which is composed of simple units; under the latter, running, fighting, obstinacy, printing, theft, parricide. The formation of mixed modes is greatly influenced by national customs. Very complicated transactions (sacrilege, triumph, ostracism), if often considered and discussed, receive for the sake of brevity comprehensive names, which cannot be rendered by a single expression in the language of other nations among whom the custom in question is not found. The elements most frequently employed in the formation of mixed modes are ideas of the two fundamental activities, thinking and motion, together with power, which is their source. Locke discusses simple modes in more detail, especially those derived from the ideas of space, time, unity, and power. Modifications of space are distance, figure, place, length; since any length or measure of space can be repeated to infinity, we reach the idea of immensity. As modes of time are enumerated succession (which we perceive and measure only by the flow of our ideas), duration, and lengths or measures of duration, the endless repetition of which yields the idea of eternity. From unity are developed the modes of numbers, and from the unlimitedness of these the idea of infinity. No idea, however, is richer in modes than the idea of power. A distinction must be made between active power and passive power, or mere receptivity. While bodies are not capable of originating motion, but only of communicating motion received, we notice in ourselves, as spiritual beings, the capacity of originating actions and motions. The body possesses only the passive power of being moved, the mind the active power of producing motion. This latter is termed "will." Here Locke discusses at length the freedom of the will, but not with entire clearness and freedom from contradictions (cf. below).

Modes are conditions which do not subsist of themselves, but have need of a basis or support; they are not conceivable apart from a thing whose properties or states they are. We notice that certain qualities always appear together, and habitually refer them to a substratum as the ground of their unity; in which they subsist or from which they proceed. Substance denotes this self-existent "we know not what," which has or bears the attributes in itself, and which arouses the ideas of them in us. It is the combination of a number of simple ideas which are presumed to belong to one thing. From the ideas of sensation the understanding composes the idea of body, and from the ideas of reflection that of mind. Each of these is just as clear and just as obscure as the other; of each we know only its effects and its sensuous properties; its essence is for us entirely unknowable. Instead of the customary names, material and immaterial substances, Locke recommends cogitative and incogitative substances, since it is not inconceivable that the Creator may have endowed some material beings with the capacity of thought. God,—the idea of whom is attained by uniting the ideas of existence, power, might, knowledge, and happiness with that of infinity,—is absolutely immaterial, because not passive, while finite spirits (which are both active and passive) are perhaps only bodies which possess the power of thinking.

While the ideas of substances are referred to a reality without the mind as their archetype, to which they are to conform and which they should image and represent, Relations (e.g., husband, greater) are free and immanent products of the understanding. They are not copies of real things, but represent themselves alone, are their own archetypes. We do not ask whether they agree with things, but, conversely, whether things agree with them (Book iv. 4.5). The mind reaches an idea of relation by placing two things side by side and comparing them. If it perceives that a thing, or a quality, or an idea begins to exist through the operation of some other thing, it derives from this the idea of the causal relation, which is the most comprehensive of all relations, since all that is actual or possible can be brought under it. Cause is that which makes another thing to begin to be; effect, that which had its beginning from some other thing. The production of a new quality is termed alteration; of artificial things, making; of a living being, generation; of a new particle of matter, creation. Next in importance is the relation of identity and diversity. Since it is impossible for a thing to be in two different places at the same time and for two things to be at the same time in the same place, everything that at a given instant is in a given place is identical with itself, and, on the other hand, distinct from everything else (no matter how great the resemblance between them) that at the same moment exists in another place. Space and time therefore form the principium individuationis. By what marks, however, may we recognize the identity of an individual at different times and in different places? The identity of inorganic matter depends on the continuity of the mass of atoms which compose it; that of living beings upon the permanent organization of their parts (different bodies are united into one animal by a common life); personal identity consists in the unity of self-consciousness, not in the continuity of bodily existence (which is at once excluded by the change of matter). The identity of the person or the ego must be carefully distinguished from that of substance and of man. It would not be impossible for the person to remain the same in a change of substances, in so far as the different beings (for instance, the souls of Epicurus and Gassendi) participated in the same self-consciousness; and, conversely, for a spirit to appear in two persons by losing the consciousness of its previous existence. Consciousness is the sole condition of the self, or personal identity.—The determinations of space and time are for the most part relations. Our answers to the questions "When?" "How long?" "How large?" denote the distance of one point of time from another (e.g., the birth of Christ), the relation of one duration to another (of a revolution of the sun), the relation of one extension to another well-known one taken as a standard. Many apparently positive ideas and words, as young and old, large and small, weak and strong, are in fact relative. They imply merely the relation of a given duration of life, of a given size and strength, to that which has been adopted as a standard for the class of things in question. A man of twenty is called young, but a horse of like age, old; and neither of these measures of time applies to stars or diamonds. Moral relations, which are based on a comparison of man's voluntary actions with one of the three moral laws, will be discussed below.

The inquiry now turns from the origin of ideas to their cognitive value or their validity, beginning (in the concluding chapters of the second book) with the accuracy of single ideas, and advancing (in Book iv., which is the most important in the whole work) to the truth of judgments. An idea is real when it conforms to its archetype, whether this is a thing, real or possible, or an idea of some other thing; it is adequate when the conformity is complete. The idea of a four-sided triangle or of brave cowardice is unreal or fantastical, since it is composed of incompatible elements, and the idea of a centaur, since it unites simple ideas in a way in which they do not occur in nature. The layman's ideas of law or of chemical substances are real, but inadequate, since they have a general resemblance to those of experts, and a basis in reality, but yet only imperfectly represent their archetypes. Nay, further, our ideas of substances are all inadequate, not only when they are taken for representations of the inner essences of things (since we do not know these essences), but also when they are considered merely as collections of qualities. The copy never includes all the qualities of the thing, the less so since the majority of these are powers, i.e., consist in relations to other objects, and since it is impossible, even in the case of a single body, to discover all the changes which it is fitted to impart to, or to receive from, other substances. Ideas of modes and relations are all adequate, for they are their own archetypes, are not intended to represent anything other than themselves, are images without originals. An idea of this kind, however, though perfect when originally formed, may become imperfect through the use of language, when it is unsuccessfully intended to agree with the idea of some other person and denominated by a current term. In the case of mixed modes and their names, therefore, the compatibility of their elements and the possible existence of their objects are not enough to secure their reality and their complete adequacy; in order to be adequate they must, further, exactly conform to the meaning connected with their names by their author, or in common use. Simple ideas are best off, according to Locke, in regard both to reality and to adequacy. For the most part, it is true, they are not accurate copies of the real qualities, of things, but only the regular effects of the powers of things. But although real qualities are thus only the causes and not the patterns of sensations, still simple ideas, by their constant correspondence with real qualities, sufficiently fulfill their divinely ordained end, to serve us as instruments of knowledge, i.e., in the discrimination of things.—An unreal and inadequate idea becomes false only when it is referred to an object, whether this be the existence of a thing, or its true essence, or an idea of other things. Truth and error belong always to affirmations or negations, that is, to (it may be, tacit) propositions. Ideas uncombined, unrelated, apart from judgments, ideas, that is, as mere phenomena in the mind, are neither true nor false.

Knowledge is defined as the "perception of the connexion and agreement, or disagreement and repugnancy" of two ideas; truth, as "the right joining or separating of signs, i.e., ideas or words." The object of knowledge is neither single ideas nor the relations of ideas to things, but the relations of ideas among themselves. This view was at once paradoxical and pregnant. If all cognition, as Locke suggests in objection to his own theory, consists in perceiving the agreement or disagreement of our ideas, are not the visions of the enthusiast and the reasonings of sober thinkers alike certain? are not the propositions, A fairy is not a centaur, and a centaur is a living being, just as true as that a circle is not a triangle, and that the sum of the angles of a triangle is equal to two right angles? The mind directly perceives nothing but its own ideas, but it seeks a knowledge of things! If this is possible it can only be indirect knowledge—the mind knows things through its ideas, and possesses criteria which show that its ideas agree with things.

Two cases must be clearly distinguished, for a considerable number of our ideas, viz., all complex ideas except those of substances, make no claim to represent things, and consequently cannot represent them falsely. For mathematical and moral ideas and principles, and the truth thereof, it is entirely immaterial whether things and conditions correspondent to them exist in nature or not. They are valid, even if nowhere actualized; they are "eternal truths," not in the sense that they are known from childhood, but in the sense that, as soon as known, they are immediately assented to.[1] The case is different, however, with simple ideas and the ideas of substances, which have their originals without the mind and which are to correspond with these. In regard to the former we may always be certain that they agree with real things, for since the mind can neither voluntarily originate them (e.g., cannot produce sensations of color in the dark) nor avoid having them at will, but only receive them from without, they are not creatures of the fancy, but the natural and regular productions of external things affecting us. In regard to the latter, the ideas of substances, we may be certain at least when the simple ideas which compose them have been found so connected in experience. Perception has an external cause, whose influence the mind is not able to withstand. The mutual corroboration furnished by the reports of the different senses, the painfulness of certain sensations, the clear distinction between ideas from actual perception and those from memory, the possibility of producing and predicting new sensations of an entirely definite nature in ourselves and in others, by means of changes which we effect in the external world (e.g. by writing down a word)—these give further justification for the trust which we put in the senses. No one will be so skeptical as to doubt in earnest the existence of the things which he sees and touches, and to declare his whole life to be a deceptive dream. The certitude which perception affords concerning the existence of external objects is indeed not an absolute one, but it is sufficient for the needs of life and the government of our actions; it is "as certain as our happiness or misery, beyond which we have no concernment, either of knowing or being." In regard to the past the testimony of the senses is supplemented by memory, in which certainty [in regard to the continued existence of things previously perceived] is transformed into high probability; while in regard to the existence of other finite spirits, numberless kinds of which may be conjectured to exist, though their existence is quite beyond our powers of perception, certitude sinks into mere (though well-grounded) faith.

[Footnote 1: Thus it results that knowledge, although dependent on experience for all its materials, extends beyond experience. The understanding is completely bound in the reception of simple ideas; less so in the combination of these into complex ideas; absolutely free in the act of comparison, which it can omit at will; finally, again, completely bound in its recognition of the relation in which the ideas it has chosen to compare stand to one another. There is room for choice only in the intermediate stage of the cognitive process; at the beginning (in the reception of the simple ideas of perception, a, b, c, d), and at the end (in judging how the concepts a b c and a b d stand related to each other), the understanding is completely determined.]

More certain than our sensitive knowledge of the existence of external objects, are our immediate or intuitive knowledge of our own existence and our mediate or demonstrative knowledge of the existence of God. Every idea that we have, every pain, every thought assures us of our own existence. The existence of God, however, as the infinite cause of all reality, endowed with intelligence, will, and supreme power, is inferred from the existence and constitution of the world and of ourselves. Reality exists; the real world is composed of matter in motion and thinking beings, and is harmoniously ordered. Since it is impossible for any real being to be produced by nothing, and since we obtain no satisfactory answer to the question of origin until we rise to something existent from all eternity, we must assume as the cause of that which exists an Eternal Being, which possesses in a higher degree all the perfections which it has bestowed upon the creatures. As the cause of matter and motion, and as the source of all power, this Being must be omnipotent; as the cause of beauty and order in the world, and, above all, as the creator of thinking beings, it must be omniscient. But these perfections are those which we combine in the idea of God.

Intuitive knowledge is the highest of the three degrees of knowledge. It is gained when the mind perceives the agreement or disagreement of two ideas at first sight, without hesitation, and without the intervention of any third idea. This immediate knowledge is self-evident, irresistible, and exposed to no doubt. Knowledge is demonstrative when the mind perceives the agreement (or disagreement) of two ideas, not by placing them side by side and comparing them, but through the aid of other ideas. The intermediate links are called proofs; their discovery is the work of the reason, and quickness in finding them out is termed sagacity. The greater the number of the intermediate steps, the more the clearness and distinctness of the knowledge decreases, and the more the possibility of error increases. In order for an argument (e. g., that a = d) to be conclusive, every particular step in it (a = b, b = c, c = d) must possess intuitive certainty. Mathematics is not the only example of demonstrative knowledge, but the most perfect one, since in mathematics, by the aid of visible symbols, the full equality and the least differences among ideas may be exactly measured and sharply determined.

Besides real existence Locke, unsystematically enough, enumerates three other sorts of agreement between ideas,—in the perception of which he makes knowledge consist,—viz., identity or diversity (blue is not yellow), relation (when equals are added to equals the results are equal), and coexistence or necessary connexion (gold is fixed). We are best off in regard to the knowledge of the first of these, "identity or diversity," for here our intuition extends as far as our ideas, since we recognize every idea, as soon as it arises, as identical with itself and different from others. We are worst off in regard to "necessary connexion." We know something, indeed, concerning the incompatibility or coexistence of certain properties (e. g., that the same object cannot have two different sizes or colors at the same time; that figure cannot exist apart from extension): but it is only in regard to a few qualities and powers of bodies that we are able to discover dependence and necessary connexion by intuitive or demonstrative thought, while in most cases we are dependent on experience, which gives us information concerning particular cases only, and affords no guarantee that things are the same beyond the sphere of our observation and experiment. Since empirical inquiry furnishes no certain and universal knowledge, and since the assumption that like bodies will in the same circumstances have like effects is only a conjecture from analogy, natural science in the strict sense does not exist. Both mathematics and ethics, however, belong in the sphere of the demonstrative knowledge of relations. The principles of ethics are as capable of exact demonstration as those of arithmetic and geometry, although their underlying ideas are more complex, more involved, hence more exposed to misunderstanding, and lacking in visible symbols; though these defects can, and should, in part be made good by careful and strictly consistent definitions. Such moral principles as "where there is no property there is no injustice," or "no government allows absolute liberty," are as certain as any proposition in Euclid.

The advantage of the mathematical and moral sciences over the physical sciences consists in the fact that, in the former, the real and nominal essences of their objects coincide, while in the latter they do not; and, further, that the real essences of substances are beyond our knowledge. The true inner constitution of bodies, the root whence all their qualities, and the coexistence of these, necessarily proceed, is completely unknown to us; so that we are unable to deduce them from it. Mathematical and moral ideas, on the other hand, and their relations, are entirely accessible, for they are the products of our own voluntary operations. They are not copied from things, but are archetypal for reality and need no confirmation from experience. The connexion constituted by our understanding between the ideas crime and punishment (e. g., the proposition: crime deserves punishment) is valid, even though no crime had ever been committed, and none ever punished. Existence is not at all involved in universal propositions; "general knowledge lies only in our own thoughts, and consists barely in the contemplation of our own abstract ideas" and their relations. The truths of mathematics and ethics are both universal and certain, while in natural science single observations and experiments are certain, but not general, and general propositions are only more or less probable. Both the particular experiments and the general conclusions are of great value under certain circumstances, but they do not meet the requirements of comprehensive and certain knowledge.

The extent of our knowledge is very limited—much less, in fact, than that of our ignorance. For our knowledge reaches no further than our ideas, and the possibility of perceiving their agreements. Many things exist of which we have no ideas—chiefly because of the fewness of our senses and their lack of acuteness—and just as many of which our ideas are only imperfect. Moreover, we are often able neither to command the ideas which we really possess, or at least might attain, nor to perceive their connexions. The ideas which are lacking, those which are undiscoverable, those which are not combined, are the causes of the narrow limits of human knowledge.

There are two ways by which knowledge may be extended: by experience, on the one hand, and, on the other, by the elevation of our ideas to a state of clearness and distinctness, together with the discovery and systematic arrangement of those intermediate ideas which exhibit the relation of other ideas, in themselves not immediately comparable. The syllogism, as an artificial form, is of little value in the perception of the agreements between these intermediate and final terms, and of none whatever in the discovery of the former. Analytical and identical propositions which merely explicate the conception of the subject, but express nothing not already known, are, in spite of their indefeasible certitude, valueless for the extension of knowledge, and when taken for more than verbal explanations, mere absurdities. Even those most general propositions, those "principles" which are so much talked of in the schools, lack the utility which is so commonly ascribed to them. Maxims are, it is true, fit instruments for the communication of knowledge already acquired, and in learned disputations may perform indispensable service in silencing opponents, or in bringing the dispute to a conclusion; but they are of little or no use in the discovery of new truth. It is a mistake to believe that special cases (as 5 = 2 + 3, or 5 = 1 + 4) are dependent on the truth of the abstract rule (the whole is equal to the sum of its parts), that they are confirmed by it and must be derived from it. The particular and concrete is not only as clear and certain as the general maxim, but better known than this, as well as earlier and more easily perceived. Nay, further, in cases where ideas are confused and the meanings of words doubtful, the use of axioms is dangerous, since they may easily lend the appearance of proved truth to assertions which are really contradictory.

Between the clear daylight of certain knowledge and the dark night of absolute ignorance comes the twilight of probability. We find ourselves dependent on opinion and presumption, or judgment based upon probability, when experience and demonstration leave us in the lurch and we are, nevertheless, challenged to a decision by vital needs which brook no delay. The judge and the historian must convince themselves from the reports of witnesses concerning events which they have not themselves observed; and everyone is compelled by the interests of life, of duty, and of eternal salvation to form conclusions concerning things which lie beyond the limits of his own perception and reflective thought, nay, which transcend all human experience and rigorous demonstration whatever. To delay decision and action until absolute certainty had been attained, would scarcely allow us to lift a single finger. In cases concerning events in the past, the future, or at a distance, we rely on the testimony of others (testing their reports by considering their credibility as witnesses and the conformity of the evidence to general experience in like cases); in regard to questions concerning that which is absolutely beyond experience, e.g., higher orders of spirits, or the ultimate causes of natural phenomena, analogy is the only help we have. If the witnesses conflict among themselves, or with the usual course of nature, the grounds pro and con must be carefully balanced; frequently, however, the degree of probability attained is so great that our assent is almost equivalent to complete certainty. No one doubts,—although it is impossible for him to "know,"—that Caesar conquered Pompey, that gold is ductile in Australia as elsewhere, that iron will sink to-morrow as well as to-day. Thus opinion supplements the lack of certain knowledge, and serves as a guide for belief and action, wherever the general lot of mankind or individual circumstances prevent absolute certitude.

Although in this twilight region of opinion demonstrative proofs are replaced merely by an "occasion" for "taking" a given fact or idea "as true rather than false," yet assent is by no means an act of choice, as the Cartesians had erroneously maintained, for in knowledge it is determined by clearly discerned reasons, and in the sphere of opinion, by the balance of probability. The understanding is free only in combining ideas, not in its judgment concerning the agreement or the repugnancy of the ideas compared; it lies within its own power to decide whether it will judge at all, and what ideas it will compare, but it has no control over the result of the comparison; it is impossible for it to refuse its assent to a demonstrated truth or a preponderant probability.

In this recognition of objective and universally valid relations existing among ideas, which the thinking subject, through comparisons voluntarily instituted, discovers valid or finds given, but which it can neither alter nor demur to, Locke abandons empirical ground (cf. p. 155) and approaches the idealists of the Platonizing type. His inquiry divides into two very dissimilar parts (a psychological description of the origin of ideas and a logical determination of the possibility and the extent of knowledge), the latter of which is, in Locke's opinion, compatible with the former, but which could never have been developed from it. The rationalistic edifice contradicts the sensationalistic foundation. Locke had hoped to show the value and the limits of knowledge by an inquiry into the origin of ideas, but his estimate of this value and these limits cannot be proved from the a posteriori origin of ideas—it can only be maintained in despite of this, and stands in need of support from some (rationalistic) principle elsewhere obtained. Thinkers who trace back all simple ideas to outer and inner perception we expect to reject every attempt to extend knowledge beyond the sphere of experience, to declare the combinations of ideas which have their origin in sensation trustworthy, and those which are formed without regard to perception, illusory; or else, with Protagoras, to limit knowledge to the individual perceiving subject, with a consequent complete denial of its general validity. But exactly the opposite of all these is found in Locke. The remarkable spectacle is presented of a philosopher who admits no other sources of ideas than perception and the voluntary combination of perceptions, transcending the limits of experience with proofs of the divine existence, viewing with suspicion the ideas of substance formed at the instance of experience, and reducing natural science to the sphere of mere opinion; while, on the other hand, he ascribes reality and eternal validity to the combinations of ideas formed independently of perception, which are employed by mathematics and ethics, and completely abandons the individualistic position in his naive faith in the impregnable validity of the relations of ideas, which is evident to all who turn their attention to them. The ground for the universal validity of the relations among ideas as well as of our knowledge of them, naturally lies not in their empirical origin (for my experience gives information to me alone, and that only concerning the particular case in question), but in the uniformity of man's rational constitution. If two men really have the same ideas—not merely think they have because they use similar language—it is impossible, according to Locke, that they should hold different opinions concerning the relation of their ideas. With this conviction, that the universal validity of knowledge is rooted in the uniformity of man's rational constitution, and the further one, that we attain certain knowledge only when things conform to our ideas, Locke closely approaches Kant; while his assumption of a fixed order of relations among ideas, which the individual understanding cannot refuse to recognize, and the typical character assigned to mathematics, associate him with Malebranche and Spinoza. In view of these points of contact with the rationalistic school and his manifold dependence on its founder, we may venture the paradox, that Locke may not only be termed a Baconian with Cartesian leanings, but (almost) a Cartesian influenced by Bacon. The possibility must not be forgotten, however, that rationalistic suggestions came to him also from Galileo, Hobbes, and Newton.[1]

[Footnote 1: Cf. the article by Benno Erdmann cited p. 156, note.]

Intermediate between knowledge and opinion stands faith as a form of assent which is based on testimony rather than on deductions of the reason, but whose certitude is not inferior to that of knowledge, since it is a communication from God, who can neither deceive nor be deceived. Faith and the certainty thereof depend on reason, in so far as reason alone can determine whether a divine revelation has really been made and the meaning of the words in which the revelation has come down to us. In determining the boundaries of faith and reason Locke makes use of the distinction—which has become famous—between things above reason, according to reason, and contrary to reason. Our conviction that God exists is according to reason; the belief that there are more gods than one, or that a body can be in two different places at the same time, contrary to reason; the former is a truth which can be demonstrated on rational grounds, the latter an assumption incompatible with our clear and distinct ideas. In the one case revelation confirms a proposition of which we were already certain; in the other an alleged revelation is incapable of depriving our certain knowledge of its force. Above reason are those principles whose probability and truth cannot be shown by the natural use of our faculties, as that the dead shall rise again and the account of the fall of part of the angels. Among the things which are not contrary to reason belong miracles, for they contradict opinion based on the usual course of nature, it is true, but not our certain knowledge; in spite of their supernatural character they deserve willing acceptance, and receive it, when they are well attested, whereas principles contrary to reason must be unconditionally rejected as a revelation from God. Locke's demand for the subjection of faith to rational criticism assures him an honorable place in the history of English deism. He enriched the philosophy of religion by two treatises of his own: The Reasonableness of Christianity, 1695, and three Letters on Tolerance, 1689-1692. The former transfers the center of gravity of the Christian religion from history to the doctrine of redemption; the Letters demand religious freedom, mutual tolerance among the different sects, and the separation of Church and State. Those sects alone are to receive no tolerance which themselves exercise none, and which endanger the well-being of society; together with atheists, who are incapable of taking oaths. In other respects it is the duty of the state to protect all confessions and to favor none.

%(b) Practical Philosophy.%—Locke contributed to practical philosophy important suggestions concerning freedom, morality, politics, and education. Freedom is the "power to begin or forbear, continue or put an end to" actions (thoughts and motions). It is not destroyed by the fact that the will is always moved by desire, more exactly, by uneasiness under present circumstances, and that the decision is determined by the judgment of the understanding. Although the result of examination is itself dependent on the unalterable relations of ideas, it is still in our power to decide whether we will consider at all, and what ideas we will take into consideration. Not the thought, not the determination of the will, is free, but the person, the mind; this has the power to suspend the prosecution of desire, and by its judgment to determine the will, even in opposition to inclination. Four stages must, consequently, be distinguished in the volitional process: desire or uneasiness; the deliberative combination of ideas; the judgment of the understanding; determination. Freedom has its place at the beginning of the second stage: it is open to me to decide whether to proceed at all to consideration and final judgment concerning a proposed action; thus to prevent desire from directly issuing in movements; and, according to the result of my examination, perhaps, to substitute for the act originally desired an opposite one. Without freedom, moral judgment and responsibility would be impossible. The above appears to us to represent the essence of Locke's often vacillating discussion of freedom (II. 21). Desire is directed to pleasure; the will obeys the understanding, which is exalted above motives of pleasure and the passions. Everything is physically good which occasions and increases pleasure in us, which removes or diminishes pain, or contributes to the attainment of some other good and the avoidance of some other evil. Actions, on the contrary, are morally good when they conform to a rule by which they are judged. Whoever earnestly meditates on his welfare will prefer moral or rational good to sensuous good, since the former alone vouchsafes true happiness. God has most intimately united virtue and general happiness, since he has made the preservation of human society dependent on the exercise of virtue.

The mark of a law for free beings is the fact that it apportions reward for obedience and punishment for disobedience. The laws to which an action must conform in order to deserve the predicate "good" are three in number (II. 28): by the divine law "men judge whether their actions are sins or duties"; by the civil law, "whether they be criminal or innocent" (deserving of punishment or not); by the law of opinion or reputation, "whether they be virtues or vices." The first of these laws threatens immorality with future misery; the second, with legal punishments; the third, with the disapproval of our fellow-men.

The third law, the law of opinion or reputation, called also philosophical, coincides on the whole, though not throughout, with the first, the divine law of nature, which is best expressed in Christianity, and which is the true touchstone of the moral character of actions. While Locke, in his polemic against innate ideas, had emphasized the diversity of moral judgments among individuals and nations (as a result of which an action is condemned in one place and praised as virtuous in another), he here gives prominence to the fact of general agreement in essentials, since it is only natural that each should encourage by praise and esteem that which is to his advantage, while virtue evidently conduces to the good of all who come into contact with the virtuous. Amid the greatest diversity of moral judgments virtue and praise, vice and blame, go together, while in general that is praised which is really praiseworthy—even the vicious man approves the right and condemns that which is faulty, at least in others. Locke was the first to call attention to general approval as an external mark of moral action, a hint which the Scottish moralists subsequently exploited. The objection that he reduced morality to the level of the conventional is unjust, for the law of opinion and reputation did not mean for him the true principle of morality, but only that which controls the majority of mankind—If anyone is inclined to doubt that commendation and disgrace are sufficient motives to action, he does not understand mankind; there is hardly one in ten thousand insensible enough to endure in quiet the constant disapproval of society. Even if the lawbreaker hopes to escape punishment at the hands of the state, and puts out of mind the thought of future retribution, he can never escape the disapproval of his misdeeds on the part of his fellows. In entire harmony with these views is Locke's advice to educators, that they should early cultivate the love of esteem in their pupils.

Of the four principles of morals which Locke employs side by side, and in alternation, without determining their exact relations—the reason, the will of God, the general good (and, deduced from this, the approval of our fellow-men), self-love—the latter two possess only an accessory significance, while the former two co-operate in such a way that the one determines the content of the good and the other confirms it and gives it binding authority. The Christian religion does the reason a threefold service—it gives her information concerning our duty, which she could have reached herself, indeed, without the help of revelation, but not with the same certitude and rapidity; it invests the good with the majesty of absolute obligation by proclaiming it as the command of God; it increases the motives to morality by its doctrines of immortality and future retribution. Although Locke thus intimately joins virtue with earthly joy and eternal happiness, and although he finds in the expectation of heaven or hell a welcome support for the will in its conflict with the passions, we must remember that he values this regard for the results and rewards of virtue only as a subsidiary motive, and does not esteem it as in itself ethical: eternal happiness forms, as it were, the "dowry" of virtue, which adds to its true value in the eyes of fools and the weak, though it constitutes neither its essence nor its basis. Virtue seems to the wise man beautiful and valuable enough even without this, and yet the commendations of philosophers gain for her but few wooers. The crowd is attracted to her only when it is made clear to it that virtue is the "best policy."

In politics Locke is an opponent of both forms of absolutism, the despotic absolutism of Hobbes and the patriarchal absolutism of Filmer (died 1647; his Patriarcha declared hereditary monarchy a divine institution), and a moderate exponent of the liberal tendencies of Milton (1608-74) and Algernon Sidney (died 1683; Discourses concerning Government). The two Treatises on Civil Government, 1690, develop, the first negatively, the second positively, the constitutional theory with direct reference to the political condition of England at the time. All men are born free and with like capacities and rights. Each is to preserve his own interests, without injuring those of others. The right to be treated by every man as a rational being holds even prior to the founding of the state; but then there is no authoritative power to decide conflicts. The state of nature is not in itself a state of war, but it would lead to this, if each man should himself attempt to exercise the right of self-protection against injury. In order to prevent acts of violence there is needed a civil community, based on a free contract, to which each individual member shall transfer his freedom and power. Submission to the authority of the state is a free act, and, by the contract made, natural rights are guarded, not destroyed; political freedom is obedience to self-imposed law, subordination to the common will expressing itself in the majority. The political power is neither tyrannical, for arbitrary rule is no better than the state of nature, nor paternal, for rulers and subjects are on an equality in the use of the reason, which is not the case with parents and children. The supreme power is the legislative, intrusted by the community to its chosen representatives—the laws should aim at the general good. Subordinate to the legislative power, and to be kept separate from it, come the two executing powers, which are best united in a single hand (the king), viz., the executive power (administrative and judicial), which carries the laws into effect, and the federative power, which defends the community against external foes. The ruler is subject to the law. If the government, through violation of the law, has become unworthy of the power intrusted to it, and has forfeited it, sovereign authority reverts to the source whence it was derived, that is, to the people. The people decides whether its representatives and the monarch have deserved the confidence placed in them, and has the right to depose them, if they exceed their authority. As the sworn obedience (of the subjects) is to the law alone, the ruler who acts contrary to law has lost the right to govern, has put himself in a state of hostility to the people, and revolution becomes merely necessary defense against aggression.

Montesquieu made these political ideas of Locke the common property of Europe.[1] Rousseau did a like service for Locke's pedagogical views, given in the modest but important Thoughts concerning Education, 1693. The aim of education should not be to instill anything into the pupil, but to develop everything from him; it should guide and not master him, should develop his capacities in a natural way, should rouse him to independence, not drill him into a scholar. In order to these ends thorough and affectionate consideration of his individuality is requisite, and private instruction is, therefore, to be preferred to public instruction. Since it is the business of education to make men useful members of society, it must not neglect their physical development. Learning through play and object teaching make the child's task a delight; modern languages are to be learned more by practice than by systematic study. The chief difference between Locke and Rousseau is that the former sets great value on arousing the sense of esteem, while the latter entirely rejects this as an educational instrument.

[Footnote 1: Cf. Theod. Pietsch, Ueber das Verhaeltniss der politischen Theorien Lockes zu Montesquieus Lehre von der Teilung der Gewalten Berlin dissertation, Breslau, 1887.]



CHAPTER V.

ENGLISH PHILOSOPHY IN THE EIGHTEENTH CENTURY.

Besides the theory of knowledge, which forms the central doctrine in his system, Locke had discussed the remaining branches of philosophy, though in less detail, and, by his many-sided stimulation, had posited problems for the Illumination movement in England and in France. Now the several disciplines take different courses, but the after-influence of his powerful mind is felt on every hand. The development of deism from Toland on is under the direct influence of his "rational Christianity"; the ethics of Shaftesbury stands in polemic relation to his denial of everything innate; and while Berkeley and Hume are deducing the consequences of his theory of knowledge, Hartley derives the impulse to a new form of psychology from his chapter on the association of ideas.

%1. Natural Philosophy and Psychology.%

In Locke's famous countryman, Isaac Newton (1642-1727),[1] the modern investigation of nature attains the level toward which it had striven, at first by wishes and demands, gradually, also, in knowledge and achievement, since the end of the mediaeval period. Mankind was not able to discard at a stroke its accustomed Aristotelian view of nature, which animated things with inner, spirit-like forces. A full century intervened between Telesius and Newton, the concept of natural law requiring so long a time to break out of its shell. A tremendous revolution in opinion had to be effected before Newton could calmly promulgate his great principle, "Abandon substantial forms and occult qualities and reduce natural phenomena to mathematical laws," before he could crown the discoveries of Galileo and Kepler with his own. For this successful union of Bacon's experimental induction with the mathematical deduction of Descartes, this combination of the analytic and the synthetic methods, which was shown in the demand for, and the establishment of, mathematically formulated natural laws, presupposes that nature is deprived of all inner life [2] and all qualitative distinctions, that all that exists is compounded of uniformly acting parts, and that all that takes place is conceived as motion. With this Hobbes's programme of a mechanical science of nature is fulfilled. The heavens and the earth are made subject to the same law of gravitation. How far Newton himself adhered to the narrow meaning of mechanism (motion from pressure and impulse), is evident from the fact that, though he is often honored as the creator of the dynamical view of nature, he rejected actio in distans as absurd, and deemed it indispensable to assume some "cause" of gravity (consisting, probably, in the impact of imponderable material particles). It was his disciples who first ventured to proclaim gravity as the universal force of matter, as the "primary quality of all bodies" (so Roger Cotes in the preface to the second edition of the Principia, 1713).

[Footnote 1: 1669-95 professor of mathematics in Cambridge, later resident in London; 1672, member, and, 1703, president of the Royal Society. Chief work, Philosophic Naturalis Principia Mathematica, 1687. Works, 1779 seq. On Newton cf. K. Snell, 1843; Durdik, Leibniz und Newton, 1869; Lange, History of Materialism, vol. i. p. 306 seq.]

[Footnote 2: That the mathematical view of nature, since it leaves room for quantitative distinctions alone, is equivalent to an examination of nature had been clearly recognized by Poiret. As he significantly remarked: The principles of the Cartesian physics relate merely to the "cadaver" of nature (Erud., p. 260).]

Newton resembles Boyle in uniting profound piety with the rigor of scientific thought. He finds the most certain proof for the existence of an intelligent creator in the wonderful arrangement of the world-machine, which does not need after-adjustment at the hands of its creator, and whose adaptation he praises as enthusiastically as he unconditionally rejects the mingling of teleological considerations in the explanation of physical phenomena. By this "physico-theological" argument he furnishes a welcome support to deism. While the finite mind perceives in the sensorium of the brain the images of objects which come to it from the senses, God has all things in himself, is immediately present in all, and cognizes them without sense-organs, the expanse of the universe forming his sensorium.

* * * * *

The transfer of mechanical views to psychical phenomena was also accompanied by the conviction that no danger to faith in God would result therefrom, but rather that it would aid in its support. The chief representatives of this movement, which followed the example of Gay, were the physician, David Hartley[1] (1704-57), and his pupil, Joseph Priestley,[2] a dissenting minister and natural scientist (born 1733, died in Philadelphia 1804; the discoverer of oxygen gas, 1774).

The fundamental position of these psychologists is expressed in two principles: (1) all cognitive and motive life is based on the mechanism of psychical elements, the highest and most complex inner phenomena (thoughts, feelings, volitions) are produced by the combination of simple ideas, that is, they arise through the "association of ideas "; (2) all inner phenomena, the complex as well as the simple, are accompanied by, or rather depend on, more or less complicated physical phenomena, viz., nervous processes and brain vibrations. Although Hartley and Priestley are agreed in their demand for an associational and physiological treatment of psychology, and in the attempt to give one, they differ in this, that Hartley cautiously speaks only of a parallelism, a correspondence between mental and cerebral processes, and rejects the materialistic interpretation of inner phenomena, pointing out that the heterogeneity of motion and ideas forbids the reduction of the latter to the former, and that psychological analysis never reaches corporeal but only psychical elements. Moreover, it is only with reluctance that, conscious of the critical character of the conclusion, he admits the dependence of brain vibrations on the mechanical laws of the material world and the thoroughgoing determinateness of the human will, consoling himself with the belief that moral responsibility nevertheless remains intact. Priestley, on the contrary, boldly avows the materialistic and deterministic consequences of his position, holds that psychical phenomena are not merely accompanied by material motions but consist in them (thought is a function of the brain), and makes psychology, as the physics of the nerves, a part of physiology. The denial of immortality and the divine origin of the world is, however, by no means to follow from materialism. Priestley not only combated the atheism of Holbach, but also entered the deistic ranks with works of his own on Natural Religion and the Corruptions of Christianity.

[Footnote 1: Hartley, Observations on Man, his Frame, his Duties, his Expectations. 1749.]

[Footnote 2: Priestley, Hartley's Theory of the Human Mind on the Principles of the Association of Ideas, 1775; Disquisitions relating to Matter and Spirit, 1777; The Doctrine of Philosophical Necessity, 1777; Free Discussions of the Doctrines of Materialism, 1778 (against Richard Price's Letters on Materialism and Philosophical Necessity). Cf. on both Schoenlank's dissertation, Hartley und Priestley, die Begruender des Assoziationismus in England, 1882.]

As early as in Hartley[1] the principle, which is so important for ethics, appears that things and actions (e.g., promotion of the good of others) which at first are sought and done because they are means to our own enjoyment, in time come to have a direct worth of their own, apart from the original egoistic end. James Mill (1829) has repeated this thought in later times. As fame becomes an immediate object of desire to the ambitious man, and gold to the miser, so, through association, the impulse toward that which will secure approval may be transformed into the endeavor after that which deserves approval.

[Footnote 1: Cf. Jodl, Geschichte der Ethik, vol. i. p. 197 seq.]

Among later representatives of the Associational school we may mention Erasmus Darwin (Zooenomia, or the Laws of Organic Life, 1794-96).



%2. Deism%.

As Bacon and Descartes had freed natural science, Hobbes, the state, and Grotius, law from the authority of the Church and had placed them on an independent basis, i.e., the basis of nature and reason, so deism[1] seeks to free religion from Church dogma and blind historical faith, and to deduce it from natural knowledge. In so far as deism finds both the source and the test of true religion in reason, it is rationalism; in so far as it appeals from the supernatural light of revelation and inspiration to the natural light of reason, it is naturalism; in so far as revelation and its records are not only not allowed to restrict rational criticism, but are made the chief object of criticism, its adherents are freethinkers.

[Footnote 1: Cf. Lechler's Geschichte des Englischen Deismus, 1841, which is rigorously drawn from the sources. [Hunt, History of Religious Thought in England, 1871-73 [1884]; Leslie Stephen, History of English Thought in the Eighteenth Century, 1876 [1880]; Cairns, Unbelief in the Eighteenth Century, 1881.]]

The general principles of deism may be compressed into a few theses. There is a natural religion, whose essential content is morality; this comprises not much more than the two maxims, Believe in God and Do your duty.

Positive religions are to be judged by this standard. The elements in them which are added to natural religion, or conflict with it, are superfluous and harmful additions, arbitrary decrees of men, the work of cunning rulers and deceitful priests. Christianity, which in its original form was the perfect expression of the true religion of reason, has experienced great corruptions in its ecclesiastical development, from which it must now be purified.

These principles are supported by the following arguments: Truth is one and there is but one true religion. If the happiness of men depends on the fulfilment of her commands, these must be comprehensible to every man and must have been communicated to him; and since a special revelation and legislation could not come to the knowledge of all, they can be no other than the laws of duty inscribed on the human heart. In order to salvation, then, we need only to know God as creator and judge, and to fulfill his commands, i.e.. to live a moral life. The one true religion has been communicated to man in two forms, through the inner natural revelation of reason, and the outer historical revelation of the Gospel. Since both have come from God they cannot be contradictory. Accordingly natural religion and the true one among the positive religions do not differ in their content, but only in the manner of their promulgation. Reason tries historical religion by the standard furnished by natural religion, and distinguishes actual from asserted revelation by the harmony of its contents with reason: the deist believes in the Bible because of the reasonableness of its teachings; he does not hold these teachings true because they are found in the Bible. If a positive religion contains less than natural religion it is incomplete; if it contains more it is tyrannical, since it imposes unnecessary requirements. The authority of reason to exercise the office of a judge in regard to the credibility of revelation is beyond doubt; indeed, apart from it there is no means of attaining truth, and the acceptance of an external revelation as genuine, and not merely as alleged to be such, is possible only for those who have already been convinced of God's existence by the inner light of reason.

To these logical considerations is added an historical position, which, though only cursorily indicated at the beginning, is evidenced in increasing detail as the deistic movement continues on its course. Natural religion is always and everywhere the same, is universal and necessary, is perfect, eternal, and original. As original, it is the earliest religion, and as old as the world; as perfect, it is not capable of improvement, but only of corruption and restoration. Twice it has existed in perfect purity, as the religion of the first men and as the religion of Christ. Twice it has been corrupted, in the pre-Christian period by idolatry, which proceeded from the Egyptian worship of the dead, in the period after Christ by the love of miracle and blind reverence for authority. In both cases the corruption has come from power-loving priests, who have sought to frighten and control the people by incomprehensible dogmas and ostentations, mysterious ceremonies, and found their advantage in the superstition of the multitude,—each new divinity, each new mystery meaning a gain for them. As they had corrupted the primitive religion into polytheism, so Christianity was corrupted by conforming it to the prejudices of those to be converted, in whose eyes the simplicity of the new doctrine would have been no recommendation for it. The Jew sought in it an echo of the Law, the heathen longed for his festivals and his occult philosophy; so it was burdened with unprofitable ceremonial observances and needless profundity, it was Judaized and heathenized. It was inevitable that the doctrines of original sin, of satisfaction and atonement should prove especially objectionable to the purely rational temper of the deists. Neither the guilt of others (the sin of our ancestors) nor the atonement of others (Christ's death on the cross) can be imputed to us; Christ can be called the Savior only by way of metaphor, only in so far as the example of his death leads us on to faith and obedience for ourselves. The name atheism, which, it is true, orthodoxy held ready for every belief incorrect according to its standard, was on the contrary undeserved. The deists did not attack Christian revelation, still less belief in God. They considered the atheist bereft of reason, and they by no means esteemed historical revelation superfluous. The end of the latter was to stir the mind to move men to reflection and conversion, to transform morals, and if anyone declared it unnecessary because it contains nothing but natural truths, he was referred to the works of Euclid, which certainly contain nothing which is not founded in the reason, but which no one but a fool will consider unnecessary in the study of mathematics.

That which we have here summarized as the general position of deism, gained gradual expression through the regular development and specialization of deistic ideas in individual representatives of the movement. The chief points and epochs were marked by Toland's Christianity not Mysterious, 1696; Collins's Discourse of Freethinking, 1713; Tindal's Christianity as Old as the Creation, 1730; and Chubb's True Gospel of Jesus Christ, 1738. The first of these demands a critique of revelation, the second defends the right of free investigation, the third declares the religion of Christ, which is merely a revived natural religion, to be the oldest religion, the fourth reduces it entirely to moral life.

The deistic movement was called into life by Lord Herbert of Cherbury (pp. 79-80) and continued by Locke, in so far as the latter had intrusted to reason the discrimination of true from false revelation, and had admitted in Christianity elements above reason, though not things contrary to reason. Following Locke, John Toland (1670-1722) goes a step further with the proof that the Gospel not only contains nothing contrary to reason, but also nothing above reason, and that no Christian doctrine is to be called mysterious. To the demand that we should worship what we do not comprehend, he answers that reason is the only basis of certitude, and alone decides on the divinity of the Scriptures, by a consideration of their contents. The motive which impels us to assent to a truth must lie in reason, not in revelation, which, like all authority and experience, is merely the way by which we attain the knowledge of the truth; it is a means of instruction, not a ground of conviction. All faith has knowledge and understanding for its conditions, and is rational conviction. Before we can put our trust in the Scriptures, we must be convinced that they were in fact written by the authors to whom they are ascribed, and must consider whether these men, their deeds, and their works, were worthy of God. The fact that God's inmost being is for us inscrutable does not make him a mystery, for even the common things of nature are known to us only by their properties. Miracles are also in themselves nothing incomprehensible; they are simply enhancements of natural laws beyond their ordinary operations, by supernatural assistance, which God vouchsafes but rarely and only for extraordinary ends. Toland explains the mysteries smuggled into the ethical religion of Christianity as due to the toleration of Jewish and heathen customs, to the entrance of learned speculation, and to the selfish inventions of the clergy and the rulers. The Reformation itself had not entirely restored the original purity and simplicity.

Thus far Toland the deist. In his later writings, the five Letters to Serena, 1704, addressed to the Prussian queen, Sophia Charlotte, and the Pantheisticon (Cosmopoli, 1720), he advances toward a hylozoistic pantheism.

The first of the Letters discusses the prejudices of mankind; the second, the heathen doctrine of immortality; the third, the origin of idolatry; while the fourth and fifth are devoted to Spinoza, the chief defect in whose philosophy is declared to be the absence of an explanation of motion. Motion belongs to the notion of matter as necessarily as extension and impenetrability. Matter is always in motion; rest is only the reciprocal interference of two moving forces. The differences of things depend on the various movements of the particles of matter, so that it is motion which individualizes matter in general into particular things. As the Letters ascribe the purposive construction of organic beings to a divine reason, so the Pantheisticon also stops short before it reaches the extreme of naked materialism. Everything is from the whole; the whole is infinite, one, eternal, all-rational. God is the force of the whole, the soul of the world, the law of nature. The treatise includes a liturgy of the pantheistic society with many quotations from the ancient poets.

Anthony Collins (1676-1729), in his Discourse of Free-thinking, shows the right of free thought (i. e., of judgment on rational grounds) in general, from the principle that no truth is forbidden to us, and that there is no other way by which we can attain truth and free ourselves from superstition, and the right to apply it to God and the Bible in particular, from the fact that the clergy differ concerning the most important matters. The fear that the differences of opinion which spring from freethinking may endanger the peace of society lacks foundation; on the contrary, it is only restriction of the freedom of thought which leads to disorders, by weakening moral zeal. The clergy are the only ones who condemn liberty of thought. It is sacrilege to hold that error can be beneficial and truth harmful. As a proof that freethinking by no means corrupts character, Collins gives in conclusion a list of noble freethinkers from Socrates down to Locke and Tillotson. Among the replies to the views of Collins we may mention the calmly objective Boyle Lectures by Ibbot, and the sharp and witty letter of Richard Bentley, the philologist. Neither of these attacks Collins's leading principle, both fully admitting the right to employ the reason, even in religious questions; but they dispute the implication that freethinking is equivalent to contentious opposition. On the one hand, they maintain that Collins's thinking is too free, that is, unbridled, hasty, presumptuous, and paradoxical; on the other, that it is not free enough (from prejudice).

After Shaftesbury had based morality on a natural instinct for the beautiful and had made it independent of religion, as well as served the cause of free thought by a keenly ironical campaign against enthusiasm and orthodoxy, and Clarke had furnished the representatives of natural religion a useful principle of morals in the objective rationality of things, the debate concerning prophecy and miracles[1] threatened to dissipate the deistic movement into scattered theological skirmishes. At this juncture Matthew Tindal (1657-1733) led it back to the main question. His Christianity as Old as the Creation is the doomsday book of deism. It contains all that has been given above as the core of this view of religion. Christ came not to bring in a new doctrine, but to exhort to repentance and atonement, and to restore the law of nature, which is as old as the creation, as universal as reason, and as unchangeable as God, human nature, and the relations of things, which we should respect in our actions. Religion is morality; more exactly, it is the free, constant disposition to do as much good as possible, and thereby to promote the glory of God and our own welfare. For the harmony of our conduct with the rules of reason constitutes our perfection, and on this depends our happiness. Since God is infinitely blessed and self-sufficient his purpose in the moral law is man's happiness alone. Whatever a positive religion contains beyond the moral law is superstition, which puts emphasis on worthless trivialities. The true religion occupies the happy mean between miserable unfaith, on the one hand, and timorous superstition, wild fanaticism, and pietistical zeal on the other. In proclaiming the sovereignty of reason in the sphere of religion as well as elsewhere, we are only openly demanding what our opponents have tacitly acknowledged in practice (e. g.> in allegorical interpretation) from time immemorial. God has endowed us with reason in order that we should by it distinguish truth from falsehood.

[Footnote 1: The chief combatant in the conflict over the argument from prophecy, which was called forth by Whiston's corruption hypothesis, was Collins (A Discourse of the Grounds and Reasons of the Christian Religion, 1724). Christianity is based on Judaism; its fundamental article is that Jesus is the prophesied Messiah of the Jews, its chief proof the argument from Old Testament prophecy, which, it is true, depends on the typical or allegorical interpretation of the passages in question. Whoever rejects this cuts away the ground from under the Christian revelation, which is only the allegorical import of the revelation of the Jews.—The second proof of revelation, the argument from miracles, was shaken by Thomas Woolston (Six Discourses on the Miracles of our Saviour, 1727-30), by his extension of the allegorical interpretation to these also. He supported himself in this by the authority of the Church Fathers, and, above all, by the argument that the accounts of the miracles, if taken literally, contradict all sense and understanding. The unavoidable doubts which arise concerning the literal interpretation of the resurrection of the dead, the healing of the sick, the driving out of devils, and the other miracles, prove that these were intended only as symbolic representations of the mysterious and wonderful effects which Jesus was to accomplish. Thus Jairus's daughter means the Jewish Church, which is to be revived at the second coming of Christ; Lazarus typifies humanity, which will be raised again at the last day; the account of the bodily resurrection of Jesus is a symbol of his spiritual resurrection from his grave in the letter of Scripture. Sherlock, whose Trial of the Witnesses of the Resurrection of Jesus was long considered a cogent answer to the attacks of Woolston, was opposed by Peter Annet, who, without leaving the refuge of figurative interpretation open, proceeded still more regardlessly in the discovery of contradictory and incredible elements in the Gospel reports, and declared all the scriptural writers together to be liars and falsifiers. If a man believes in miracles as supernatural interferences with the regular course of nature (and they must be so taken if they are to certify to the divine origin of the Scriptures), he makes God mutable, and natural laws imperfect arrangements which stand in need of correction. The truth of religion is independent of all history.]

Thomas Chubb (1679-1747), a man of the people (he was a glove maker and tallow-chandler), and from 1715 on a participant in deistic literature and concerned to adapt the new ideas to the men of his class, preached in The True Gospel of Jesus Christ an honorable working-man's Christianity., Faith means obedience to the law of reason inculcated by Christ, not the acceptance of the facts reported about him. The gospel of Christ was preached to the poor before his death and his asserted resurrection and ascension. It is probable that Christ really lived, because of the great effect of his message; but he was a man like other men. His gospel is his teaching, not his history, his own teaching, not that of his followers—the reflections of the apostles are private opinions. Christ's teaching amounts, in effect, to these three fundamental principles: (1) Conform to the rational law of love to God and one's neighbor; this is the only ground of divine acceptance. (2) After transgression of the law, repentance and reformation are the only grounds of divine grace and forgiveness. (3) At the last day every one will be rewarded according to his works. By proclaiming these doctrines, by carrying them out in his own pure life and typical death, and by founding religio-ethical associations on the principle of brotherly equality, Christ selected the means best fitted for the attainment of his purpose, the salvation of human souls. His aim was to assure men of future happiness (and of the earthly happiness connected therewith), and to make them worthy of it; and this happiness can only be attained when from free conviction we submit ourselves to the natural moral law, which is grounded on the moral fitness of things. Everything which leads to the illusion that the favor of God is attainable by any other means than by righteousness and repentance, is pernicious; as, also, the confusion of Christian societies with legal and civil societies, which pursue entirely different aims.