Respectfully Quoted: A Dictionary of Quotations. 1989.
NUMBER:
607
AUTHOR:
George Chapman (1559?1634)
QUOTATION:
Young men think old men are fools, but old men know young men are fools.
ATTRIBUTION:
GEORGE CHAPMAN, All Fools, act V, scene ii, lines 2056, p. 87 (1968).
This was a common proverb which appeared not only in Chapmans play, first published in 1605, but in other works as well. See The Oxford Dictionary of English Proverbs, pp. 92728 (1970).