When a thing has been said and well said, have no scruple: take it and copy it.
Quand une chose a été dite et bien dite, n'ayez aucun scrupule, prenez-la, copiez.
Original text (French)
Notes from Wikiquote
As quoted in Anatole France en pantoufles by Jean-Jacques Brousson (1924); published in English as Anatole France Himself: A Boswellian Record by His Secretary, Jean-Jacques Brousson (1925), trans. John Pollock [Read Books, 2007, ISBN 1-406-75172-3], p. 56