If you keep your feathers well oiled the water of criticism will run off as from a duck's back.
(Ellen Henrietta Swallow Richards (1842-1911), U.S. chemist and educator. As quoted in The Life of Ellen H. Richards, ch. 9, by Caroline L. Hunt (1912).
Written in the 1870s to a woman student whom she was educating through correspondence courses. Richards had been the first woman to graduate from the Massachusetts Institute of Technology (MIT).)
It is not when truth is dirty, but when it is shallow, that the lover of knowledge is reluctant to step into its waters.
(Friedrich Nietzsche (1844-1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 4, p. 70, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980); Thus Spoke Zarathustra, p. 55, trans. by Walter Kaufmann, New York, Penguin Books (1978). Zarathustra, in Thus Spoke Zarathustra, First Part, "On Chastity," (1883).)
(Morrie Ryskind, U.S. screenwriter, Robert Florey, and Joseph Santley. Mr. Hammer (Groucho Marx), The Cocoanuts, responding to a guest's request for "ice water," (1929).
Ryskind adapted this film from original Broadway play by George Kaufman.)