Ask at the forum if you have an Ancient or Modern Greek query!
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
subs.
P. συμφωνία, ἡ, Ar. and P. ἁρμονία, ἡ.