Plato, Laws 838d

θαυμαστήν τινα δύναμιν εἴληχεν, ὅταν μηδεὶς μηδαμῶς ἄλλως ἀναπνεῖν ἐπιχειρήσῃ ποτὲ παρὰ τὸν νόμον. οὐκοῦν ὀρθὸν τὸ νυνδὴ ῥηθέν, ὅτι νομοθέτῃ, βουλομένῳ τινὰ ἐπιθυμίαν δουλώσασθαι τῶν διαφερόντως τοὺς ἀνθρώπους δουλουμένων, ῥᾴδιον γνῶναί γε ὅντινα τρόπον χειρώσαιτο ἄν· ὅτι καθιερώσας ταύτην τὴν φήμην παρὰ πᾶσι, δούλοις τε καὶ ἐλευθέροις καὶ παισὶ καὶ γυναιξὶ καὶ ὅλῃ τῇ πόλει κατὰ τὰ αὐτά, οὕτω τὸ βεβαιότατον ἀπειργασμένος

has a surprising influence, when there is no attempt by anybody ever to breathe a word that contradicts the law. Then is it not true, as I said just now, that when a lawgiver wishes to subdue one of those lusts which especially subdue men, it is easy for him at least to learn the method of mastering them,—that it is by consecrating this public opinion in the eyes of all alike—bond and free, women and children, and the whole State—that he will effect the firmest security