If you have a garden and a library, you have everything you need
‘He who has a garden and a library wants for nothing’ is an adaptation of the original quotation from Cicero’s Epistulae ad Familiares (Letters to his friends), book IX, epistle 4, where Cicero on the Ides of June (June 13),46 BC, is writing to his friend Terentius Varro and says: “Si hortum in bibliotheca habes, deerit nihil”.
The literal translation would be : “If you have a garden in your library, nothing will fail”, i.e. “If you have a garden and a library, you have everything you need” or “If you have a garden and a library, you will want for nothing”.