ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → life is not worth living if you do not have at least one friend
subs.
Intelligence, mind: P. and V. νοῦς, ὁ, σύνεσις, ἡ, γνώμη, ἡ, Ar. and P. διάνοια, ἡ, Ar. and V. φρήν, ἡ, or pl. (rare P.).
Power of understanding: P. and V. μάθησις, ἡ.
