Attributed to Aristotle in Diogenes Laertius "The Lives and Opinions of Eminent Philosophers" translated by C. D. Yonge and Henry G. Bohn (p. 188), 1853.
Henry Ward Beecher (1880). “Golden Gleams: From Rev. Henry Ward Beecher's Words and Works : Being a Choice Collection of Over 350 Extracts from the Latest Writings, Sermons, and Lectures of the Celebrated American Preacher and Author”