Quotation brings to many people one of the intensest joys of living…. This innocent vanity often helps us over the hard places in life; it gives us a warm little glow against the coldness of the world and keeps us snug and happy. – Bernard Darwin, May 1941, introduction to The Oxford Dictionary of Quotations

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

In these circumstances I think we must take the bull by the horns… and, making due allowances, quote whenever we feel that the allusion is interesting or helpful or amusing. – Clifton Fadiman, c.1955

One man’s wit, and all men’s wisdom. – John Russell, definition of a proverb