Some lines are born quotations, some are made quotations, and some have “quotation” thrust upon them. – Gary Saul Morson, The Words of Others: From Quotations to Culture, 2011

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

People will accept your idea more readily if you tell them Benjamin Franklin said it first. – David H. Comins, quoted in The Washingtonian, Volume14, 1978