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EPICURUS: I come hither, O ye Athenians, to justify in your assembly what I maintained in my school, and I find myself impeached by furious antagonists instead of reasoning with calm and dispassionate inquirers.

When we infer any particular cause from an effect we must proportion the one to the other, and can never be allowed to ascribe to the cause any qualities but what are sufficient to produce the effect. A body of ten ounces raised in a scale may serve as a proof that the counterbalancing weight exceeds ten ounces, but never that it exceeds a hundred.

The same rule holds whether the cause assigned be brute, unconscious matter or a rational, intelligent being. If the cause be known only by the effect, we never ought to ascribe to it any qualities beyond what are precisely requisite to produce the effect. Nor can we return back from the cause and infer other effects from it beyond those by which alone it is known to us.

Allowing, therefore, the gods to be the authors of the existence, or order, of the universe, it follows that they possess that precise degree of power, intelligence, and benevolence which appears in their workmanship; but we can never be allowed to mount up from the universe, the effect, to Jupiter, the cause, and then descend downwards to infer any new effect from that cause. The knowledge of the cause being derived solely from the effect, they must be exactly adjusted to each other; and the one can never refer to anything farther.

I deny a Providence, you say, and Supreme Governor of the world, who guides the course of events and punishes the vicious with infamy and disappointment, and rewards the virtuous with honour and success in all their undertakings. But surely I deny not the course of events itself, which lies open to everyone's inquiry and examination. I acknowledge that, in the present order of things, virtue is attended with more peace of mind than vice, and meets with a more favourable reception from the world. I am sensible that, according to the past experience of mankind, friendship is the chief joy of human life, and moderation the only source of tranquillity and happiness. I never balance between the virtuous and the vicious life, but am sensible that, to a well-disposed mind, every advantage is on the side of the former. And what can you say more, allowing all your suppositions and reasonings?

IMMANUEL KANT

The Critique of Pure Reason

Immanuel Kant, the most celebrated of German metaphysicians, was born at K?nigsberg on April 22, 1724, and died on February 12, 1804. Taking his degree at K?nigsberg, he speedily entered on a professional career, which he quietly and strenuously pursued for over thirty years. Though his lectures were limited to the topics with which he was concerned as professor of logic and philosophy, his versatility is evidenced by the fact that he was offered the chair of poetry, which he declined. His lasting reputation began with the publication, in 1781, of his wonderful "Critique of Pure Reason" . Within twelve years of its appearance it was expounded in all the leading universities, and even penetrated into the schools of the Church of Rome. Kant was the first European thinker who definitely grasped the conception of a critical philosophy, though he was doubtless aided by the tendency of Locke's psychology. He did much to counteract the sceptical influence of Hume. The main object of his "Critique of Pure Reason" is to separate the necessary and universal in the realm of knowledge from the merely experimental or empirical. This little version of Kant's celebrated work has been prepared from the German text.

Pure representation, entirely apart from sensation, in a transcendental signification, forms the pure intuition of the mind, existing in it as a mere form of sensibility. Transcendental aesthetic is the science of all the principles of sensibility. But transcendental logic is the science of the principles of pure thought. In studying the former we shall find that there are two pure forms of sensuous intuition, namely, space and time.

Logic can be treated in two directions: either as logic of the general use of the understanding, or of some particular use of it. The former includes the rules of thought, without which there can be no use of the understanding; but it has no regard to the objects to which the understanding is applied. This is elementary logic. But logic of the understanding in some particular use includes rules of correct thought in relation to special classes of objects; and this latter logic is generally taught in schools as preliminary to the study of sciences.

Thus, general logic takes no account of any of the contents of knowledge, but is limited simply to the consideration of the forms of thought. But we are constrained by anticipation to form an idea of a logical science which has to deal not only with pure thought, but also has to determine the origin, validity, and extent of the knowledge to which intuitions relate, and this science might be styled transcendental logic.

In transcendental aesthetic we isolated the faculty of sensibility. So in transcendental logic we isolate the understanding, concentrating our consideration on that element of thought which has its source simply in the understanding. But transcendental logic must be divided into transcendental analytic and transcendental dialectic. The former is a logic of truth, and is intended to furnish a canon of criticism. When logic is used to judge not analytically, but to judge synthetically of objects in general, it is called transcendental dialectic, which serves as a protection against sophistical fallacy.

ANALYTIC OF PURE CONCEPTS

The understanding may be defined as the faculty of judging. The function of thought in a judgment can be brought under four heads, each with three subdivisions.

If we examine each of these forms of judgment we discover that in every one is involved some peculiar idea which is its essential characteristic. Thus, a singular judgment, in which the subject of discourse is a single object, involves obviously the special idea of oneness, or unity. A particular judgment, relating to several objects, implies the idea of plurality, and discriminates between the several objects. Now, the whole list of these ideas will constitute the complete classification of the fundamental conceptions of the understanding, regarded as the faculty which judges, and these may be called categories.

TRANSCENDENTAL DIALECTIC

A distinction is usually made between what is immediately known and what is only inferred. It is immediately known that in a figure bounded by three straight lines there are three angles, but that these angles together are equal to two right angles is only inferred. In every syllogism is first a fundamental proposition; secondly, another deduced from it; and, thirdly, the consequence.

In the use of pure reason its concepts, or transcendental ideas, aim at unity of all conditions of thought. So all transcendental ideas may be arranged in three classes; the first containing the unity of the thinking subject; the second, the unity of the conditions of phenomena observed; the third, the unity of the objective conditions of thought.

This classification becomes clear if we note that the thinking subject is the object-matter of psychology; while the system of all phenomena is the object-matter of cosmology; and the Being of all Beings is the object-matter of theology.

Hence we perceive that pure reason supplies three transcendental ideas, namely, the idea of a transcendental science of the soul ; of a transcendental science of the world ; and, lastly, of a transcendental science of God . It is the glory of transcendental idealism that by it the mind ascends in the series of conditions till it reaches the unconditioned, that is, the principles. We thus progress from our knowledge of self to a knowledge of the world, and through it to a knowledge of the Supreme Being.

Transcendental reason attempts to reconcile conflicting assertions. There are four of these antinomies, or conflicts.

FIRST ANTINOMY. Thesis. The world has a beginning in time, and is also limited in regard to space. Proof. Were the world without a time-beginning we should have to ascribe a present limit to that which can have no limit, which is absurd. Again, were the world not limited in regard to space, it must be conceived as an infinite whole, yet it is impossible thus to conceive it.

Antithesis. The world has neither beginning in time, nor limit in space, but in both regards is infinite. Proof. The world must have existed from eternity, or it could never exist at all. If we imagine it had a beginning, we must imagine an anterior time when nothing was. But in such time the origin of anything is impossible. At no moment could any cause for such a beginning exist.

SECOND ANTINOMY. Thesis. Every composite substance in the world is composed of simple parts. This thesis seems scarcely to require proof. No one can deny that a composite substance consists of parts, and that these parts, if themselves composite, must consist of others less composite, till at length we come, by compulsion of thought, to the conception of the absolutely simple as that wherein the substantial consists.

THIRD ANTINOMY. Thesis. The causality of natural law is insufficient for the explanation of all the phenomena of the universe. For this end another kind of causality must be assumed, whose attribute is freedom. Proof. All so-called natural causes are effects of preceding causes, forming a regressive series of indefinite extent, with no first beginning. So we never arrive at an adequate cause of any phenomenon. Yet natural law has for its central demand that nothing shall happen without such a cause.

Antithesis. All events in the universe occur under the exclusive operation of natural laws, and there is no such thing as freedom. Proof. The idea of a free cause is an absurdity. For it contradicts the very law of causation itself, which demands that every event shall be in orderly sequence with some preceding event. Now, free causation is such an event, being the active beginning of a series of phenomena. Yet the action of the supposed free cause must be imagined as independent of all connection with any previous event. It is without law or reason, and would be the blind realisation of confusion and lawlessness. Therefore transcendental freedom is a violation of the law of causation, and is in conflict with all experience. We must of necessity acquiesce in the explanation of all phenomena by the operation of natural law, and thus transcendental freedom must be pronounced a fallacy.

FOURTH ANTINOMY. Thesis. Some form of absolutely necessary existence belongs to the world, whether as its part or as its cause. Proof. Phenomenal existence is serial, mutable, consistent. Every event is contingent upon a preceding condition. The conditioned pre-supposes, for its complete explanation, the unconditioned. The whole of past time, since it contains the whole of all past conditions, must of necessity contain the unconditioned or also "absolutely necessary."

Antithesis. There is no absolutely necessary existence, whether in the world as its part, or outside of it as its cause. Proof. Of unconditionally necessary existence within the world there can be none. The assumption of a first unconditioned link in the chain of cosmical conditions is self-contradictory. For such link or cause, being in time, must be subject to the law of all temporal existence, and so be determined--contrary to the original assumption--by another link or cause before it.

The supposition of an absolutely necessary cause of the world, existing without the world, also destroys itself. For, being outside the world, it is not in time. And yet, to act as a cause, it must be in time. This supposition is therefore absurd.

The theses in these four antinomies constitute the teaching of philosophical dogmatism. The antitheses constitute doctrines of philosophical empiricism.

The cosmological argument contends that if anything exists, there must also exist an absolutely necessary being. Now, at least I myself exist. Hence there exists an absolutely necessary being. The argument coincides with that by which the thesis of the fourth antinomy is supposed. The objections to it are summed up in the proof of the antithesis of the fourth antimony. As soon as we have recognised the true conception of causality, we have already transcended the sensible world.

The physico-theological or teleological argument is what is often styled the argument from design. It proceeds not from general, but particular experience. Nature discloses manifold signs of wise intention and harmonious order, and these are held to betoken a divine designer. This argument deserves always to be treated with respect. It is the oldest and clearest of all proofs, and best adapted to convince the reason of the mass of mankind. It animates us in our study of nature. And it were not only a cheerless, but an altogether vain task to attempt to detract from the persuasive authority of this proof. There is nought to urge against its rationality and its utility.

All arguments, however, to prove the existence of God must, in order to be theoretically valid, start from specifically and exclusively sensible or phenomenal data, must employ only the conceptions of pure physical science, and must end with demonstrating in sensible experience an object congruous with, or corresponding to, the idea of God. But this requirement cannot be met, for, scientifically speaking, the existence of an absolutely necessary God cannot be either proved or disproved. Hence room is left for faith in any moral proofs that may present themselves to us, apart from science. With this subject ethics, the science of practice or of practical reason, will have to deal.

The Critique of Practical Reason

Practical principles are propositions containing a general determination of the will. They are maxims, or subjective propositions, when expressing the will of an individual; objective, when they are valid expressions of the will of rational beings generally.

Practical principles which pre-suppose an object of desire are empirical, or experimental, and supply no practical laws. Reason, in the scope of a practical law, influences the will not by the medium of pleasure or pain. All rational beings necessarily wish for happiness, but they are not all agreed either as to the means to attain it, or as to the objects of their enjoyment of it. Thus, subjective practical principles can only be reckoned as maxims, never as law.

A rational being ought not to conceive that his individual maxims are calculated to constitute universal laws, and to become the basis of universal legislation. To discover any law which would bring all men into harmony is absolutely impossible.

One of the problems of practical reason is to find the law which can necessarily determine the will, assuming that the will is free. The solution of this problem is to be found in action according to the moral law. We should so act that the maxim of our will can always be valid as a principle of universal legislation. Experience shows how the moral consciousness determines freedom of the will.

Suppose that someone affirms of his inclination for sensual pleasure that he cannot possibly resist temptation to indulgence. If a gallows were erected at the place where he is tempted, on which he should be hanged immediately after satiating his passions, would he not be able to control his inclination? We need not long doubt what would be his answer.

But ask him, if his sovereign commanded him to bear false witness against an honourable man, under penalty of death, whether he would hold it possible to conquer his love of life. He might not venture to say what he would choose, but he would certainly admit that it is possible to make choice. Thus, he judges that he can choose to do a thing because he is conscious of moral obligation, and he thus recognises for himself a freedom of will of which, but for the moral law, he would never have been conscious.

We obtain the exact opposite of the principle of morality if we adopt the principle of personal private happiness as the determining motive of the will. This contradiction is not only logical, but also practical. For morality would be totally destroyed were not the voice of reason as clear and penetrating in relation to the will, even to the most ordinary men.

If one of your friends, after bearing false witness against you, attempted to justify his base conduct by enumerating the advantages which he had thus secured for himself and the happiness he had gained, and by declaring that thus he performed a true human duty, you would either laugh him to scorn or turn from him in horror. And yet, if a man acts for his own selfish ends, you have not the slightest objection to such behaviour.

MORALITY AND HAPPINESS

The maxim of self-love simply advises; the law of morality commands. There is a vast difference between what we are advised and what we are obliged to do. No practical laws can be based on the principle of happiness, even on that of universal happiness, for the knowledge of this happiness rests on merely empirical or experimental data, every man's ideas of it being conditioned only on his individual opinion. Therefore, this principle of happiness cannot prescribe rules for all rational beings.

But the moral law demands prompt obedience from everyone, and thus even the most ordinary intelligence can discern what should be done. Everyone has power to comply with the dictates of morality, but even with regard to any single aim it is not easy to satisfy the vague precept of happiness. Nothing could be more absurd than a command that everyone should make himself happy, for one never commands anyone to do what he inevitably wishes to do. Finally, in the idea of our practical reason, there is something which accompanies the violation of a moral law--namely, its demerit, with the consciousness that punishment is a natural consequence. Therefore, punishment should be connected in the idea of practical reason with crime, as a consequence of the crime, by the principles of moral legislation.

ANALYSIS OF PRINCIPLES

The practical material principles of determination constituting the basis of morality may be thus classified.

External: Education; the civil constitution. Internal: Physical feeling; moral feeling.

Internal: Perfection. External: Will of God.

The subjective elements are all experimental, or empirical, and cannot supply the universal principle of morality, though they are expounded in that sense by such writers as Montaigne, Mandeville, Epicurus, and Hutcheson.

But the objective elements, as enunciated and expounded by Wolf and the Stoics, and by Crusius and other theological moralists, are founded on reason, for absolute perfection as a quality of things can only be thought of by rational concepts.

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