Date: 1714

"But when a monad has organs that are adjusted in such a way that, through them, there is contrast and distinction among the impressions they receive, and consequently contrast and distinction in the perceptions that represent them [in the monads] (as, for example, when the rays of light are conc...

— Leibniz, Gottfried Wilhelm (1646-1716)

Date: 1730

"What dreadful havoc in the human breast / The passions make, when unconfin'd, and mad, / They burst, unguided by the mental eye, / The light of reason; which in various ways / Points them to good, or turns them back from ill."

— Thomson, James (1700-1748)

Date: 1742

"Warnings point out our danger; gnomons, time: / As these are useless when the sun is set; / So those, but when more glorious Reason shines. / Reason should judge in all; in Reason's eye, / That sedentary shadow travels hard."

— Young, Edward (bap. 1683, d. 1765)

Date: 1742

"Through chinks, styled organs, dim Life peeps at light; / Death bursts the' involving cloud, and all is day; / All eye, all ear, the disembodied power."

— Young, Edward (bap. 1683, d. 1765)

Date: 1817

"The wise Stagyrite speaks of no successive particles propagating motion like billiard balls (as Hobbs;) nor of nervous or animal spirits, where inanimate and irrational solids are thawed down, and distilled, or filtrated by ascension, into living and intelligent fluids, that etch and re-etch eng...

— Coleridge, Samuel Taylor (1772-1834)

Date: w. 1821, 1840

"Reason is to imagination as the instrument to the agent, as the body to the spirit, as the shadow to the substance."

— Shelley, Percy Bysshe (1792-1822)

Date: 1922

"I plucked my soul out of its secret place, / And held it to the mirror of my eye, / To see it like a star against the sky, / A twitching body quivering in space, / A spark of passion shining on my face."

— McKay, Claude (1889-1948)