Date: 1674

"And as for the Bipartition of this Sensitive Soul into two principle members as it were, or active sourses; vix. the Fiery part, upon which Life depends; and the Lucid, from whence all the faculties Animal are, like so many distinct rayes of light, derived."

— Charleton, Walter (1620-1707)

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: January 1739

"In general we may remark, that the minds of men are mirrors to one another, not only because they reflect each others emotions, but also because those rays of passions, sentiments and opinions may be often reverberated, and may decay away by insensible degrees."

— Hume, David (1711-1776)

Date: 1756

"But the Truth is, this unnatural Power corrupts both the Heart, and the Understanding. And to prevent the least Hope of Amendment, a King is ever surrounded by a Crowd of infamous Flatterers, who find their Account in keeping him from the least Light of Reason, till all Ideas of Rectitude and Ju...

— Burke, Edmund (1729-1797)

Date: 1756

"But the Passions which prop these Opinions are withdrawn one after another, and the cool Light of Reason at the Setting of our Life shews us what a false Splendor played upon these Objects during our more sanguine Seasons."

— Burke, Edmund (1729-1797)

Date: 1757

"During such calm sunshine of the mind, these spectres of false divinity never make their appearance."

— Hume, David (1711-1776)

Date: 1770

"Let him not intrude upon the company of men of science; but repose with his brethren Aquinas and Suarez, in the corner of some Gothic cloister, dark as his understanding, and cold as his heart."

— Beattie, James (1735-1803)