“Note: Voltaire cites this saying in his poem "La Bégueule" ("The prude woman") while ascribing it to an unnamed "Italian sage"; he also gives the saying (without attribution) in Italian (Il meglio è l'inimico del bene [note spelling difference: l'inimico instead of nemico for "[the] enemy") in the article "Art Dramatique" ("Dramatic Art", 1770) in the Dictionnaire philosophique”

Source: Wikiquote