Date: 1818, 1859

"Now this is by no means possible, for as soon as we turn into ourselves to make the attempt, and seek for once to know ourselves fully by means of introspective reflection, we are lost in a bottomless void; we find ourselves like the hollow glass globe, from out of which a voice speaks whose cau...

— Schopenhauer, Arthur (1788-1860)

Date: 1830

"To grasp intelligence as this night-like mine or pit in which is stored a world of infinitely many images and representations, yet without being in consciousness, is from the one point of view the universal postulate which bids us treat the notion as concrete, in the way we treat, for example, t...

— Hegel, G. W. F. (1770-1831)

Date: 1805-6, published 1833-6

"The third faculty Kant finds in reason, to which he advances from the understanding after the same psychological method; that is to say, he hunts through the soul's sack to see what faculties are still to be found there; and thus by merest chance he lights on Reason."

— Hegel, G. W. F. (1770-1831)