American Heritage Dictionary of the English Language, 5th Edition
Literal translation of the German term Ding an sich.
Thing-in-itself Sentence Examples
He maintained that the physical and the psychical are two orders which are parallel without interference; that the physical or objective order is merely phenomena, or groups of feelings, or " objects," while the psychical or subjective order is both a stream of feelings of which we are conscious in ourselves, and similar streams which we infer beyond ourselves, or, as he came to call them, " ejects "; that, if we accept the doctrine of evolution at all, we must carry these ejective streams of feelings through the whole organic world and beyond it to the inorganic world, as a " quasimental fact "; that at bottom both orders, the physical phenomena and the psychical streams, are reducible to feelings; and that therefore there is no reason against supposing that they are made out of the same " mind-stuff," which is the thing-in-itself.
Admitting Kant's hypothesis that by inner sense we are conscious of mental states only, he holds that this consciousness constitutes a knowledge of the "thing-in-itself" - which Kant denies.
To Aristotle matter is the undifferentiated primal element: it is rather that from which things develop (U7roKE4tEvov, Siuvaµus) than a thing in itself (ivep-yeta).
Since form cannot produce matter nor subject object, we are forced to assume a thing-in-itself.
A thing-in-itself which is not a thing to some consciousness is an entirely unrealizable, because self-contradictory, conception.