Date: 1820

"Only a sense / Remains of them, like the omnipotence / Of music, when the inspired voice and lute / Languish, ere yet the responses are mute, / Which through the deep and labyrinthine soul, / Like echoes through long caverns, wind and roll."

— Shelley, Percy Bysshe (1792-1822)

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: 1838

All the "eye doth meet is mist and crag" in "the world of thought and mental might"

— Keats, John (1795-1821)

Date: March 1843

"The mind is in a sad state when Sleep, the all-involving, cannot confine her spectres within the dim region of her sway, but suffers them to break forth, affrighting this actual life with secrets that perchance belong to a deeper one."

— Hawthorne, Nathaniel (1804-1864)

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

"Caverns there were within my mind which sun / Could never penetrate, yet did there not / Want store of leafy arbours where the light / Might enter in at will."

— Wordsworth, William (1770-1850)

Date: 1850

"Imagination--here the Power so called / Through sad incompetence of human speech, / That awful Power rose from the mind's abyss / Like an unfathered vapour that enwraps, / At once, some lonely traveller"

— Wordsworth, William (1770-1850)

Date: 1850

"The immeasurable height / Of woods decaying, never to be decayed, / The stationary blasts of waterfalls, / And in the narrow rent at every turn / Winds thwarting winds, bewildered and forlorn, / The torrents shooting from the clear blue sky, / The rocks that muttered close upon our ears, / Black...

— Wordsworth, William (1770-1850)

Date: 1850

"And, as the horizon of my mind enlarged, / Again I took the intellectual eye / For my instructor, studious more to see / Great truths, than touch and handle little ones."

— Wordsworth, William (1770-1850)

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)