Plato, Laws 766a

καὶ ἀγρίων καὶ ἀνθρώπων· ἄνθρωπος δέ, ὥς φαμεν, ἥμερον, ὅμως μὴν παιδείας μὲν ὀρθῆς τυχὸν καὶ φύσεως εὐτυχοῦς, θειότατον ἡμερώτατόν τε ζῷον γίγνεσθαι φιλεῖ, μὴ ἱκανῶς δὲ ἢ μὴ καλῶς τραφὲν ἀγριώτατον, ὁπόσα φύει γῆ. ὧν ἕνεκα οὐ δεύτερον οὐδὲ πάρεργον δεῖ τὴν παίδων τροφὴν τὸν νομοθέτην ἐᾶν γίγνεσθαι, πρῶτον δὲ ἄρξασθαι χρεὼν τὸν μέλλοντα αὐτῶν ἐπιμελήσεσθαι καλῶς αἱρεθῆναι, τῶν ἐν τῇ πόλει ὃς ἂν ἄριστος εἰς πάντα ᾖ, τοῦτον κατὰ δύναμιν ὅτι

Man, as we affirm, is a tame creature: none the less, while he is wont to become an animal most godlike and tame when he happens to possess a happy nature combined with right education, if his training be deficient or bad, he turns out the wildest of all earth’s creatures. Wherefore the lawgiver must not permit them to treat the education of children as a matter of secondary or casual importance; but, inasmuch as the presiding official must be well selected, he must begin first by charging them to appoint as president, to the best of their power,