Plato, Laws 648c

παρακελευόμενος καὶ νουθετῶν καὶ τιμῶν, τὸν δὲ ἀτιμάζων, ὅστις σοι μὴ πείθοιτο εἶναι τοιοῦτος οἷον σὺ τάττοις ἐν πᾶσιν; καὶ γυμνασάμενον μὲν εὖ καὶ ἀνδρείως ἀζήμιον ἀπαλλάττοις ἄν, κακῶς δέ, ζημίαν ἐπιτιθείς; ἢ τὸ παράπαν οὐκ ἂν χρῷο, μηδὲν ἄλλο ἐγκαλῶν τῷ πώματι; καὶ πῶς οὐκ ἂν χρῷτο, ὦ ξένε; γυμνασία γοῦν, ὦ φίλε, παρὰ τὰ νῦν θαυμαστὴ ῥᾳστώνης ἂν εἴη καθʼ ἕνα καὶ κατʼ ὀλίγους καὶ καθʼ ὁπόσους

but degradation for all those that refused to conform wholly to the character you prescribed? And would you acquit without penalty everyone who had trained himself manfully and well, but impose a penalty on everyone who had done so badly? Or would you totally refuse to employ the potion as a test, although you have no objection to it on other grounds? Of course he would employ it, Stranger. At any rate, my friend, the training involved would be wonderfully simple, as compared with our present methods, whether it were applied to individuals singly, or to small groups,