That part of a work of one author found in another is not of itself piracy, or sufficient to support an action; a man may adopt part of the work of another; he may so make use of another’s labors for the promotion of science and the benefit of the public. – Lord Ellenborough, quoted in Bouvier’s Law Dictionary by John Bouvier, 8th

The wise men of old have sent most of their morality down the stream of time in the light skiff of apothegm or epigram; and the proverbs of nations, which embody the commonsense of nations, have the brisk concussion of the most sparkling wit. – Edwin P. Whipple, lecture delivered before the Boston Mercantile Library Associa

The study of proverbs may be more instructive and comprehensive than the most elaborate scheme of philosophy. – Attributed to Motherwell in Pearls of Thought by Maturin M. Ballou, 1882

Quotation, like much better things, has its abuses. One may quote till one compiles. The ancient lawyers used to quote at the bar till they had stagnated their own cause. – Isaac D’Israeli, “Quotation,” A Second Series of Curiosities of Literature