Quotations cause all kinds of trouble. – Willis Goth Regier, Quotology, 2010

I don’t mind citing a bad author if the line is good. – Seneca, “On Tranquility of Mind,” translated by Moses Hadas

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