ἔργοισι χρηστός, οὐ λόγοις ἔφυν μόνον → a friend in deeds, and not in words alone
examine: see examine.
correct: P. and V. ἐξορθοῦν, διορθοῦν, ἀνορθοῦν, Ar. and P. ἐπανορθοῦν, V. μεθαρμόζειν.