Plato, Laws 798b

εὐτυχίαν ἀκίνητοι γένωνται μακρῶν καὶ πολλῶν χρόνων, ὡς μηδένα ἔχειν μνείαν μηδὲ ἀκοὴν τοῦ ποτε ἄλλως αὐτὰ σχεῖν ἢ καθάπερ νῦν ἔχει, σέβεται καὶ φοβεῖται πᾶσα ἡ ψυχὴ τό τι κινεῖν τῶν τότε καθεστώτων. μηχανὴν δὴ δεῖ τὸν νομοθέτην ἐννοεῖν ἁμόθεν γέ ποθεν ὅντινα τρόπον τοῦτʼ ἔσται τῇ πόλει. τῇδʼ οὖν ἔγωγε εὑρίσκω. τὰς παιδιὰς πάντες διανοοῦνται κινουμένας τῶν νέων, ὅπερ ἔμπροσθεν ἐλέγομεν, παιδιὰς ὄντως εἶναι καὶ οὐ τὴν μεγίστην ἐξ αὐτῶν

for many centuries, so that there exists no recollection or report of their ever having been different from what they now are,—then the whole soul is forbidden by reverence and fear to alter any of the things established of old. By hook or by crook, then, the lawgiver must devise a means whereby this shall be true of his State. Now here is where I discover the means desired:—Alterations in children’s games are regarded by all lawgivers (as we said above) as being mere matters of play, and not as the causes of serious mischief;