Plato, Laws 773d

δεῖ δίκην κρατῆρος κεκραμένην, οὗ μαινόμενος μὲν οἶνος ἐγκεχυμένος ζεῖ, κολαζόμενος δὲ ὑπὸ νήφοντος ἑτέρου θεοῦ καλὴν κοινωνίαν λαβὼν ἀγαθὸν πῶμα καὶ μέτριον ἀπεργάζεται. τοῦτʼ οὖν γιγνόμενον ἐν τῇ τῶν παίδων μείξει διορᾶν ὡς ἔπος εἰπεῖν δυνατὸς οὐδείς· τούτων δὴ χάριν ἐᾶν μὲν νόμῳ τὰ τοιαῦτα ἀναγκαῖον, ἐπᾴδοντα δὲ πείθειν πειρᾶσθαι τὴν τῶν παίδων ὁμαλότητα αὐτῶν αὑτοῖς τῆς τῶν γάμων

that a State should be like a bowl of mixed wine, where the wine when first poured in foams madly, but as soon as it is chastened by the sober deity of water, it forms a fair alliance, and produces a potion that is good and moderate. That this is precisely what happens in the blending of children is a thing which hardly anyone is capable of perceiving; therefrom in the legal code we must omit such rules, and merely try by the spell of words to persuade each one