Date: 360 B.C.

"For it does not admit of exposition like other branches of knowledge; but after much converse about the matter itself and a life lived together, suddenly a light, as it were, is kindled in one soul by a flame that leaps to it from another, and thereafter sustains itself."

— Plato (427 BC - 347 BC)

Date: November 10, 1750

"Is it that a long commerce with the world does indeed corrupt the heart; and extinguish by degrees those sparks of light, those inclinations to good, which were implanted in our minds?"

— Mulso [later Chapone], Hester (1727-1801)

Date: 1782

"I read it carefully a second time--pondered--weighed--and submitted--whenever a spark of vanity seems to be glowing at my heart--I will read your letter--and what then?"

— Sancho, Charles Ignatius (1729-1780)

Date: January 19, 1791

"You know them but at a distance, on the statements of those who always flatter the reigning power, and who, amidst their representations of the grievances, inflame your minds against those who are oppressed. These are amongst the effects of unremitted labour, when men exhaust their attention, bu...

— Burke, Edmund (1729-1797)