Collections of gnomes, adages, sayings, and parables have been made from times immemorial in all countries and in all languages possessing some kind of literature. – E.H. Michelsen, A Manual of Quotations from the Ancient, Modern, and Oriental La

Not everything that can be extracted appears in anthologies of quotations, in commonplace books, or on the back of Celestial Seasonings boxes. Only certain sorts of extracts become quotations. – Gary Saul Morson, The Words of Others: From Quotations to Culture, 2011

You could compile, I should think, the worst book in the world entirely out of selecting passages from the best writers in the world. – G.K. Chesterton, “On Writing Badly”

My quarrel with him is, that his works contain nothing worth quoting; and a book that furnishes no quotations, is me judice, no book,—it is a plaything. – Thomas Love Peacock, Crotchet Castle, 1831 (The Rev. Dr. Folliott)