Humor, however broad and genial, takes a narrower view than enthusiasm.
(Henry David Thoreau (1817-1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 397, Houghton Mifflin (1906).)
Humour is consistent with pathos, whilst wit is not.
(Samuel Taylor Coleridge (1772-1834), British poet, critic. repr. In Collected Works, vol. 14, ed. Kathleen Coburn (1990). "Table Talk," vol. 1 (1821), reported by Thomas Allsop in Letters and Conversations of S.T. Coleridge (1836).)
In some sort of crude sense, which no vulgarity, no humor, no overstatement can quite extinguish, the physicists have known sin; and this is a knowledge which they cannot lose.
(J. Robert Oppenheimer (1904-1967), U.S. physicist. Lecture, November 25, 1947, delivered at Massachusetts Institute of Technology. "Physics in the Contemporary World," no. 50, Technology Review (1948).
The remark became notorious when it was quoted in Time (February 23, 1948 and November 8, 1948).)