Plato, Laws 798c

σπουδὴν καὶ βλάβην συμβαίνειν, ὥστε οὐκ ἀποτρέπουσιν ἀλλὰ συνέπονται ὑπείκοντες, καὶ οὐ λογίζονται τόδε, ὅτι τούτους ἀνάγκη τοὺς παῖδας τοὺς ἐν ταῖς παιδιαῖς νεωτερίζοντας ἑτέρους ἄνδρας τῶν ἔμπροσθεν γενέσθαι παίδων, γενομένους δὲ ἄλλους, ἄλλον βίον ζητεῖν, ζητήσαντας δέ, ἑτέρων ἐπιτηδευμάτων καὶ νόμων ἐπιθυμῆσαι, καὶ μετὰ τοῦτο ὡς ἥξοντος τοῦ νυνδὴ λεγομένου μεγίστου κακοῦ πόλεσιν

hence, instead of forbidding them, they give in to them and adopt them. They fail to reflect that those children who innovate in their games grow up into men different from their fathers; and being thus different themselves, they seek a different mode of life, and having sought this, they come to desire other institutions and laws; and none of them dreads the consequent approach of that result which we described just now as the greatest of all banes