[T]he governess… looked upon him [Mr. Swiveller] as a literary gentleman of eccentric habits, and of a most prodigious talent in quotation. – Charles Dickens, The Old Curiosity Shop, 1841

We prefer to think that the absence of inverted commas guarantees the originality of a thought, whereas it may be merely that the utterer has forgotten its source. – Clifton Fadiman, The American Treasury, 1455-1955, 1955

Proverbs are in the world of thought what gold coin is in the world of business—great value in small compass, and equally current among all people. Sometimes the proverb may be false, the coin counterfeit, but in both cases the false proves the value of the true. – Attributed to D. March in A Dictionary of Thoughts: A Cyclopedia of Laconic Quot

A writer can get into a vast deal of trouble through misquotation. If you ever want to receive lots of mail, I recommend you get a Shakespeare quote wrong in a magazine or newspaper.” – Joseph Epstein, Foreward to Fred Shapiro’s Yale Book of Quotations, 2006