Date: c. 370-365 B.C.

"After this their happiness depends upon their self-control; if the better elements of the mind which lead to order and philosophy prevail, then they pass their life here in happiness and harmony--masters of themselves and orderly--enslaving the vicious and emancipating the virtuous elements of t...

— Plato (427 BC - 347 BC)

Date: 1686, 1689, 1697

"Indeed, whosoever considers the curious Inventions of Wit, the vast Comprehension and subtile Inferences of the Understanding, the wonderful Sagacity and Prospect of Prudence, the noble Endowments and Speculations of the Mind, the quick Transitions and Successions of Thoughts, together with the ...

— Nourse, Timothy (c.1636–1699)

Date: January 1739

"The attention is on the stretch; the posture of the mind is uneasy; and the spirits being diverted from their natural course, are not governed in their movements by the same laws, at least not to the same degree, as when they flow in their usual channel."

— Hume, David (1711-1776)

Date: 1777

"But the heart, that natural seat of evil propensities, that little troublesome empire of the passions, is led to what is right by slow motions and imperceptible degrees."

— More, Hannah (1745-1833)