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: 1848

"It is often obscure, often half-told; for he who wrote it, in his clear seeing of the things beneath, may have been impatient of detailed interpretations; for if we choose to dwell upon it and trace it, it will lead us always securely back to that metropolis of the soul’s dominion from which we ...

— Ruskin, John (1819-1900)

Date: 1850

"The relation discovered, must be something remote from all the common tracks and sheep-walks made in the mind."

— Smith, Sydney (1771-1845)

Date: 1854

"Nay, be a Columbus to whole new continents and worlds within you, opening new channels, not of trade, but of thought."

— Henry David Thoreau (1817-1862)

Date: 1854

"What was the meaning of that South-Sea Exploring Expedition, with all its parade and expense, but an indirect recognition of the fact, that there are continents and seas in the moral world to which every man is an isthmus or an inlet, yet unexplored by him, but that it is easier to sail many tho...

— Henry David Thoreau (1817-1862)

Date: 1854

"The surface of the earth is soft and impressible by the feet of men; and so with the paths which the mind travels."

— Henry David Thoreau (1817-1862)

Date: 1869

"His mind resembled chiefly the rugged and outstanding mountain, and yet it had characteristics which reminded you likewise of the gentle stream, flowing sweetly through the valley below."

— Sprague, William Buell (1795-1876)

Date: January, 1884

"I propose in this article to supplement Mr. Sully's chapter on the Illusions of Introspection, by showing what immense tracts of our inner life are habitually overlooked and falsified by our most approved psychological authorities."

— James, William (1842-1910)

Date: 1885

"For example, to express our ideas concerning their physical basis we use different metaphors--stored up ideas, engraved images, well-beaten paths."

— Ebbinghaus, Hermann (1850-1909)