What a good thing Adam had — when he said a good thing, he knew nobody had said it before. – Mark Twain, 1867

It is probably to Talleyrand, that Receiver-General of waif wit and estray epigram, that more sayings have been wrongly attributed than to any other modern. – William Mathews, “Quotation and Misquotation,” in North American Review, January

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

The profoundest thought or passion sleeps as in a mine, until an equal mind and heart finds and publishes it. – Ralph Waldo Emerson, “Quotation and Originality,” Letters and Social Aims, 1876