Date: 1757

"This in the mean time is obvious, that the empire of all religious faith over the understanding is wavering and uncertain, subject to every variety of humour, and dependent on the present incidents, which strike the imagination."

— Hume, David (1711-1776)

Date: 1780-85; in French, 36 vols. 1749-1788

"Is it difficult to perceive that our ideas originate from our senses alone; that the objects we regard as real existences, are those concerning which the senses uniformly give the same testimony."

— Buffon, Georges Louis Leclerc, comte de (1707-1788)