Date: 1817

"The thought thereof is awful, sweet, and holy, / Chacing away all worldliness and folly; / Coming sometimes like fearful claps of thunder, Or the low rumblings earth's regions under; / And sometimes like a gentle whispering / Of all the secrets of some wond'rous thing / That breathes about u...

— Keats, John (1795-1821)

Date: 1817

"Full many a dreary hour have I past, / My brain bewilder'd, and my mind o'ercast / With heaviness."

— Keats, John (1795-1821)

Date: 1818 (1819?)

"There are four seasons in the mind of man"

— Keats, John (1795-1821)

Date: 1818 (1819?)

"His soul has in its Autumn, when his wings / He furleth close."

— Keats, John (1795-1821)

Date: 1820

"Thus a number of writers possess the form, whilst they want the spirit of those whom, it is alleged, they imitate; because the former is the endowment of the age in which they live, and the latter must be the uncommunicated lightning of their own mind."

— Shelley, Percy Bysshe (1792-1822)

Date: 1820

"The cloud of mind is discharging its collected lightning, and the equilibrium between institutions and opinions is now restoring or is about to be restored."

— Shelley, Percy Bysshe (1792-1822)

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

"And we breathe, and sicken not, / The atmosphere of human thought: / Be it dim, and dank, and gray, / Like a storm-extinguished day, / Travelled o'er by dying gleams; / Be it bright as all between / Cloudless skies and windless streams, / Silent, liquid, and serene; / As the birds within the win...

— Shelley, Percy Bysshe (1792-1822)

Date: 1822

"Thrice has a gloomy vision hunted me / As thus from sleep into the troubled day; / It shakes me as the tempest shakes the sea, / Leaving no figure upon memory's glass"

— Shelley, Percy Bysshe (1792-1822)

Date: 1825

The "ethereal mind" may be clouded

— Barbauld, Anna Letitia [née Aikin] (1743-1825)