Date: 1805-6, published 1833-6

"Spirit often seems to have forgotten and lost itself, but inwardly opposed to itself, it is inwardly working ever forward (as when Hamlet says of the ghost of his father, 'Well said, old mole! canst work i' the ground so fast?') until grown strong in itself it bursts asunder the crust of earth w...

— Hegel, G. W. F. (1770-1831)

Date: 1805-6, published 1833-6

"At such a time, when the encircling crust, like a soulless decaying tenement, crumbles away, and spirit displays itself arrayed in new youth, the seven league boots are at length adopted"

— Hegel, G. W. F. (1770-1831)

Date: 1805-6, published 1833-6

"Kant however places the matter somewhat in this fashion: there are things-in-themselves outside, but devoid of time and space; consciousness now comes, and it has time and space beforehand present in it as the possibility of experience, just as in order to eat it has mouth and teeth, &c., as con...

— Hegel, G. W. F. (1770-1831)

Date: 1805-6, published 1833-6

"Knowledge itself is in fact the unity and truth of both moments; but with Kant the thinking understanding and sensuousness are both something particular, and they are only united in an external, superficial way, just as a piece of wood and a leg might be bound together by a cord."

— 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)

Date: 1805-6, published 1833-6

"It would make no difference if there had been no Reason there, just as with physicists it is a matter of perfect indifference whether, for instance, there is such a thing as magnetism or not."

— Hegel, G. W. F. (1770-1831)

Date: 1833, 1840

"The phenomena must be freed once and for all from the grim torture chamber of empiricism, mechanism, and dogmatism; they must be brought before the jury of man's common sense."

— Goethe, Johann Wolfgang (1749-1832)

Date: December 1840

"Perhaps a friendly Morgan le Fay will make Siegfried's castle rise again for me or show my mind's eye what heroic deeds are reserved for his sons of the nineteenth century."

— Engels, Friedrich (1820-1895)

Date: 1841

"It is the solar system of the mind."

— Marx, Karl (1818-1883)

Date: w. btw. April and August, 1844

"Logic -- mind's coin of the realm, the speculative or mental value of man and nature -- its essence which has grown totally indifferent to all real determinateness, and hence unreal -- is alienated thinking, and therefore thinking which abstracts from nature and from real man: abstract thinking."

— Marx, Karl (1818-1883)