Date: 1820

"Hark, sister! what a low yet dreadful groan / Quite unsuppressed is tearing up the heart / Of the good Titan, as storms tear the deep, / And beasts hear the sea moan in inland caves."

— Shelley, Percy Bysshe (1792-1822)

Date: 1820

"To cheer thy state / I bid ascend those subtle and fair spirits, / Whose homes are the dim caves of human thought, / And who inhabit, as birds wing the wind, / Its world-surrounding aether."

— Shelley, Percy Bysshe (1792-1822)

Date: 1820

"On a poet's lips I slept / Dreaming like a love-adept / In the sound his breathing kept; / Nor seeks nor finds he mortal blisses, / But feeds on the aëreal kisses / Of shapes that haunt thought's wildernesses."

— Shelley, Percy Bysshe (1792-1822)

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: 1826

"[T]hen sweet Memory / May come, and with her mirror cheer thy mind, / On whose bright surface lovelier scenes shall live / Than any shrined within Italian climes."

— Radcliffe [née Ward], Ann (1764-1823)

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)