Ethics also were treated by that realistic philosophy according to the laws of the phenomenon, which it regarded as absolute and valid also for the thing in itself. They were therefore based now upon a doctrine of happiness, now upon the will of the Creator, and finally upon the conception of perfection; a conception which, taken by itself, is entirely empty and void of content, for it denotes a mere relation that only receives significance from the things to which it is applied. “To be perfect” means nothing more than “to correspond to some conception which is presupposed and given,” a conception which must therefore be previously framed, and without which the perfection is an unknown quantity, and consequently has no meaning when expressed alone. If, however, it is intended tacitly to presuppose the conception “humanity,” and accordingly to make it the principle of morality to strive after human perfection, this is only saying: “Men ought to be as they ought to be,”—and we are just as wise as before. In fact “perfect” is very nearly a mere synonym of “complete,” for it signifies that in one given case or individual, all the predicates which lie in the conception of its species appear, thus are actually present. Therefore the conception “perfection,” if used absolutely and in the abstract, is a word void of significance, and this is also the case with the talk about the “most perfect being,” and other similar expressions. All this is a mere jingle of words. Nevertheless last century this conception of perfection and imperfection had become current coin; indeed it was the hinge upon which almost all speculation upon ethics, and even theology, turned. It was in every one’s mouth, so that at last it became a simple nuisance. We see even the best writers of the time, for example Lessing, entangled in the most deplorable manner in perfections and imperfections, and struggling with them. At the same time, every thinking man must at least dimly have felt that this conception is void of all positive content, because, like an algebraical symbol, it denotes a mere relation _in abstracto_. Kant, as we have already said, entirely separated the undeniably great ethical significance of actions from the phenomenon and its laws, and showed that the former directly concerned the thing in itself, the inner nature of the world, while the latter, _i.e._, time, space, and all that fills them, and disposes itself in them according to the law of causality, is to be regarded as a changing and unsubstantial dream. The little I have said, which by no means exhausts the subject, may suffice as evidence of my recognition of the great merits of Kant,—a recognition expressed here both for my own satisfaction, and because justice demands that those merits should be recalled to the memory of every one who desires to follow me in the unsparing exposure of his errors to which I now proceed. ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐