Date: 1620

"Lastly, knowing how much the sight of man's mind is distracted by experience and history, and how hard it is at the first (especially for minds either tender or preoccupied) to become familiar with nature, I not unfrequently subjoin observations of my own, being as the first offers, inclinations...

— Bacon, Sir Francis, Lord Verulam (1561-1626)

Date: 1686, 1689, 1697

"The grand Instruments by which the Understanding works, are Memory and Invention: Now, since these Faculties have their foundation in the sensitive Capacity, as this Prop is withdrawn, the Understanding must of Consequence be more clouded and obscure."

— Nourse, Timothy (c.1636–1699)

Date: 1690, 1694, 1695, 1700, 1706

"At least they interpose themselves so much between our understandings and the truth which it would contemplate and apprehend, that like the medium through which visible objects pass, their obscurity and disorder do not seldom cast a mist before our eyes, and impose upon our understandings."

— Locke, John (1632-1704)