(4) The question how things-in-themselves are constituted, quite apart from our sense-receptivity and from the activity of our understanding, must be answered by the further question: how were we able to know that things existed? "Thingness" is one of our own inventions. The question is whether there are not a good many more ways of creating such a world of appearance—and whether this creating, rationalising, adjusting, and falsifying be not the best-guaranteed reality itself: in short, whether that which "fixes the meaning of things" is not the only reality: and whether the "effect of environment upon us" be not merely the result of such will-exercising subjects.... The other "creatures" act upon us; our adjusted world of appearance is an arrangement and an overpowering of its activities: a sort of defensive measure. The subject alone is demonstrable; the hypothesis might be advanced that subjects are all that exist,—that "object" is only a form of action of subject upon subject ... a modus of the subject.
(k) The Metaphysical Need.
570.
If one resembles all the philosophers that have gone before, one can have no eyes for what has existed and what will exist—one sees only what is. But as there is no such thing as Being; all that the philosophers had to deal with was a host of fancies, this was their "world."
571.
To assert the existence as a whole of things concerning which we know nothing, simply because there is an advantage in not being able to know anything of them, was a piece of artlessness on Kant's part, and the result of the recoil-stroke of certain needs—especially in the realm of morals and metaphysics.
572.
An artist cannot endure reality; he turns away or back from it: his earnest opinion is that the worth of a thing consists in that nebulous residue of it which one derives from colour, form, sound, and thought; he believes that the more subtle, attenuated, and volatile, a thing or a man becomes, the more valuable he becomes: the less real, the greater the worth. This is Platonism: but Plato was guilty of yet further audacity in the matter of turning tables—he measured the degree of reality according to the degree of value, and said: The more there is of "idea" the more there is of Being. He twisted the concept "reality" round and said: "What ye regard as real is an error, and the nearer we get to the 'idea' the nearer we are to 'truth.'"—Is this understood? It was the greatest of all rechristenings: and because Christianity adopted it, we are blind to its astounding features. At bottom, Plato, like the artist he was, placed appearance before Being! and therefore lies and fiction before truth! unreality before actuality!—He was, however, so convinced of the value of appearance, that he granted it the attributes of "Being," "causality," "goodness," and "truth," and, in short, all those things which are associated with value.
The concept value itself regarded as a cause: first standpoint.