“It seems the part of wisdom.”
Source: The Task (1785), Book IV, The Winter Evening, Line 336.
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William Cowper 174
(1731–1800) English poet and hymnodist 1731–1800Related quotes

“Not to know certain things is a great part of wisdom.”
As quoted in Wendy Toliver (ed.), The Little Giant Encyclopedia of Inspirational Quotes, p. 466

“Folly will run its course and it is the part of wisdom not to take it too seriously.”
Source: Aphorisms and Reflections (1901), p. 216

John Stuart Mill, as quoted by Stevenson in Call to Greatness (1954), p. 102; this has also been misquoted as "That which seems the height of absurdity in one generation often becomes the height of wisdom in another."
Misattributed

Sanctuary http://www.wsu.edu/~campbelld/wharton/books/snctr10.txt, (1903) part II, ch. IV

Autobiographical Essay (2001)

K 37
Aphorisms (1765-1799), Notebook K (1789-1793)