Voltaire (1694-1778) French writer [pseud. of Francois-Marie Arouet]
Letter to the Duc de Richelieu (18 Jun 1743)
(Source)
A signature phrase of Voltaire's, attributed (by him) to a wise or sage Italian. His French translation is "Le mieux est l’ennemi du bien." Other mentions include an entry on "Art Dramatique" in his Philosophical Dictionary (1764), and the poem "La Bégueule" (1772).
If you have a garden and a library, you have everything you need.
[Si hortum in bibliotheca habes, deerit nihil.]
Marcus Tullius Cicero (106-43 BC) Roman orator, statesman, philosopher Epistulae ad Familiares [Letters to Friends], Book 9, Letter 4 “To Varro” (9.4) (46-45 BC)
In June 708 AUC. Sometimes rendered "nihil deerit."
Alt. trans.: "If you have a garden in your library, everything will be complete." [Source].