Voltaire [François Marie Arouet] (1694–1778), French philosopher, author. Candide, in Candide, or Optimism (Candide, ou l'Optimisme) (1759), ch. 15, p. 210, Paris, Garnier Flammarion (1966).
Comment made by Candide, the hero of the philosophical tale by that name, after killing three men by accident or in self-defense.