least follow that, if I am unwilling that something be done to myself, I ought not to do it to others. The same is true of every other principle or leading proposition of Ethics that has hitherto been put forward.
If we now return to the above question:—how does the law read, in obeying which, according to Kant, duty consists? and on what is it based?—we shall find that our philosopher, like most others, has in an extremely artificial manner closely connected the principle of Morals with its basis. I again call attention to what I have already examined at the outset—I mean, the Kantian claim that the principle of Ethics must be purely a priori and purely formal, indeed an a priori synthetical proposition, which consequently may not contain anything material, nor rest upon anything empirical, whether objectively in the external world, or subjectively in consciousness, such as any feeling, inclination, impulse, and the like. Kant was perfectly aware of the difficulty of this position; for on p. 60 (R., p. 53) he says: "It will be seen that philosophy has here indeed reached a precarious standpoint, which yet is to be immovable, notwithstanding that it is neither dependent on, nor supported by, anything in heaven or on earth." We shall therefore with all the greater interest and curiosity await the solution of the problem he has set himself, namely, how something is to arise out of nothing, that is, how out of purely a priori conceptions, which contain nothing empirical or material, the laws of material human action are to grow up. This is a process which we may find symbolised in chemistry, where out of three invisible gases (Azote, Hydrogen, and Chlorine[9]), and thus in apparently empty space, solid sal-ammoniac is evolved before our eyes.
I will, however, explain, more clearly than Kant either would or could, the method whereby he accomplishes this difficult task. The demonstration is all the more necessary because what he did appears to be seldom properly understood. Almost all Kant's disciples have fallen into the mistake of supposing that he presents his Categorical Imperative directly as a fact of consciousness. But in that case its origin would be anthropological, and, as resting on experience, although internal, it would have an empirical basis: a position which runs directly counter to the Kantian view, and which he repeatedly rejects. Thus on p. 48 (R., p. 44) he says: "It cannot be empirically determined whether any such Categorical Imperative exists everywhere"; and again, on p. 49 (R., p. 45): "The possibility of the Categorical Imperative must be investigated entirely on a priori grounds, because here we are not helped by any testimony of experience as to its reality." Even Reinhold, his first pupil, missed this point; for in his Beitrage zur Uebersicht der Philosophie am Anfange des 19. Jahrhunderts, No. 2, p. 21, we find him saying: "Kant assumes the moral law to be a direct and certain reality, an original fact of the moral consciousness." But if Kant had wished to make the Categorical Imperative a fact of consciousness, and thus give it an empirical foundation, he certainly would not have failed at least to put it forward as such. And this is precisely what he never does. As far as I know, the Categorical Imperative appears for the first time in the Kritik der Reinen Vernunft (p. 802 of the first, and p. 830 of the fifth edition), entirely ex nunc (unexpectedly), without any preamble, and merely connected with the preceding sentence by an altogether unjustifiable "therefore."; It is only in the Grundlage zur Metaphysik der Sitten—a book to which we here devote especial attention—that it is first introduced expressly and formally, as a deduction from certain concepts. Whereas in Reinhold's Formula concordiae des Kriticismus,[10] we actually read on p. 122 the following sentence: "We distinguish moral self-consciousness from the experience with which it, as an original fact transcending all knowledge, is bound up in the human consciousness; and we understand by such self-consciousness the direct consciousness of duty, that is, of the necessity we are under of admitting the legitimacy—whether pleasurable or the reverse—of the will, as the stimulus and as the measure of its own operations."
This would of course be "a charming thesis, with a very pretty hypothesis to boot."[11] But seriously: into what an outrageous petitio principii do we find Kant's moral law here developed! If that were true, Ethics would indubitably have a basis of incomparable solidity, and there would be no need of any questions being set for prize essays, to encourage inquiry in this direction. But the greatest marvel would be, that men had been so slow in discovering such a fact of consciousness, considering that for the space of thousands of years a basis for Morals has been sought after with zealous patient toil. How Kant himself is responsible for this deplorable mistake, I shall explain further on; nevertheless, one cannot but wonder at the undisputed predominance of such a radical error among his disciples. Have they never, whilst writing all their numberless books on the Kantian philosophy, noticed the disfigurement which the Kritik der Reinen Vernunft underwent in the second edition, and which made it an incoherent, self-contradictory work? It seems that this has only now come to light; and, in my opinion, the fact has been quite correctly analysed in Rosenkranz's preface to the second volume of his complete edition of Kant's works. We must, however, remember that many scholars, being unceasingly occupied as teachers and authors, find very little time left for private and exact research. It is certain that docendo disco (I learn by teaching) is not unconditionally true; sometimes indeed one is tempted to parody it by saying: semper docendo nihil disco (by always teaching I learn nothing); and even what Diderot puts into the mouth of Rameau's nephew is not altogether without reason: "'And as for these teachers, do you suppose they understand the sciences they give instruction in? Not a bit of it, my dear sir, not a bit of it. If they possessed sufficient knowledge to be able to teach them, they would not do so.' 'Why?' 'Because they would have devoted their lives to the study of them.'"—(Goethe's translation, p. 104.) Lichtenberg too says: "I have rather observed that professional people are often exactly those who do not know best." But to return to the Kantian Ethics: most persons, provided only the conclusion reached agrees with their moral feelings, immediately assume that there is no flaw to be found in its derivation; and if the process of deduction looks difficult, they do not trouble themselves much about it, but are content to trust the faculty.
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