Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
P. and V. σοφῶς, Ar. and P. φρονίμως.
clearly: P. and V. σαφῶς; see sharply.
