The ancients, who in these matters were not perhaps such blockheads as some may conceive, considered poetical quotation as one of the requisite ornaments of oratory. – Isaac D’Israeli, “Quotation,” A Second Series of Curiosities of Literature

We who are quotatious are never truly alone, but always hear the cheerful flow of remarks made by dead writers so much more intelligent than we. – Joseph Epstein, “Quotatious,” A Line Out for a Walk: Familiar Essays, 1991

It is my belief that nearly any invented quotation, played with confidence, stands a good chance to deceive. – Mark Twain (Samuel L. Clemens), Following the Equator: A Journey Around the Worl

Then your words of abuse today may turn into a universally valid principle of denigration, for words are magical formulae. They leave fingermarks behind on the brain, which in the twinkling of an eye becomes the footprints of history. One ought to watch one’s every word. – Franz Kafka, quoted by Gustav Janouch, Conversations with Kafka