Now since such an intuition, namely intellectual intuition, lies absolutely outside our faculty of cognition, the use of the categories can by no means reach beyond the boundaries of the objects of experience; and although beings of understanding certainly correspond to the beings of sense, and there may even be beings of understanding to which our sensible faculty of intuition has no relation at all, our concepts of understanding, as mere forms of thought for our sensible intuition, do not reach these in the least; thus that which we call noumenon must be understood to be such only in a negative sense