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: 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)