Friendship

Ὧν ἡ σοφία παρασκευάζεται εἰς τὴν τοῦ ὅλου βίου μακαριότητα, πολὺ μέγιστόν ἐστιν ἡ τῆς φιλίας κτῆσις.

Epicurus from Samos – Greek philosopher (341-270 B. C.); from “Lives and Opinions of Eminent Philosophers” (Book ten, Epicurus) by Diogenes Laërtius (Greek historian and doxographer, 3rd century CE)