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

To quote copiously and well, requires taste, judgment, and erudition, a feeling for the beautiful, an appreciation of the noble, and a sense of the profound. – Christian Nestell Bovee, “Thought,” Institutions and Summaries of Thought, 1862

The adventitious beauty of poetry may be felt in the greater delight which a verse gives in happy quotation than in the poem. – Ralph Waldo Emerson, “Art”