THE UNKNOWN WORLD OF THE “SUBJECT.”—What men have found it so difficult to understand from the most ancient times down to the present day is their ignorance in regard to themselves, not merely with respect to good and evil, but something even more essential. The oldest of illusions lives on, namely, that we know, and know precisely in each case, how human action is originated. Not only “God who looks into the heart,” not only the man who acts and reflects upon his action, but everybody does not doubt that he understands the phenomena of action in every one else. “I know what I want and what I have done, I am free and responsible for my act, and I make others responsible for their acts; I can mention by its name every moral possibility and every internal movement which precedes an act,—ye may act as ye will, I understand myself and I understand you all!” Such was what every one thought once upon a time, and almost every one thinks so even now. Socrates and Plato, who in this matter were great sceptics and admirable innovators, were nevertheless intensely credulous in regard to that fatal prejudice, that profound error, which holds that “The right knowledge must necessarily be followed by the right action.” In holding this principle they were still the heirs of the universal folly and presumption that knowledge exists concerning the essence of an action. “It would indeed be dreadful if the comprehension of the essence of a right action were not followed by that right action itself”—this was the only manner in which these great men thought it necessary to demonstrate this idea, the contrary seemed to them to be inconceivable and mad; and nevertheless this contrary corresponds to the naked reality which has been demonstrated daily and hourly from time immemorial. Is it not a “dreadful” truth that all that we know about an act is never sufficient to accomplish it, that the bridge connecting the knowledge of the act with the act itself has never yet been built? Acts are never what they appear to us to be. We have taken great pains to learn that external things are not as they appear to us.—Well! It is the same with internal phenomena. All moral acts are in reality “something different,”—we cannot say anything more about them, and all acts are essentially unknown to us. The general belief, however, has been and still is quite the contrary: the most ancient realism is against us: up to the present humanity has thought, “An action is what it appears to be.” (In re-reading these words a very expressive passage from Schopenhauer occurs to me, and I will quote it as a proof that he, too, without the slightest scruple, continued to adhere to this moral realism: “Each one of us is in reality a competent and perfect moral judge, knowing exactly good and evil, made holy by loving good and despising evil,—such is every one of us in so far as the acts of others and not his own are under consideration, and when he has merely to