Plato, Laws 659c

—πρὸς γὰρ τὴν τῶν κριτῶν ἡδονὴν ποιοῦσιν οὖσαν φαύλην, ὥστε αὐτοὶ αὐτοὺς οἱ θεαταὶ παιδεύουσιν—διέφθαρκεν δʼ αὐτοῦ τοῦ θεάτρου τὰς ἡδονάς· δέον γὰρ αὐτοὺς ἀεὶ βελτίω τῶν αὑτῶν ἠθῶν ἀκούοντας βελτίω τὴν ἡδονὴν ἴσχειν, νῦν αὐτοῖς δρῶσιν πᾶν τοὐναντίον συμβαίνει. τί ποτʼ οὖν ἡμῖν τὰ νῦν αὖ διαπερανθέντα τῷ λόγῳ σημαίνειν βούλεται; σκοπεῖσθʼ εἰ τόδε. τὸ ποῖον; δοκεῖ μοι τρίτον ἢ τέταρτον ὁ λόγος εἰς ταὐτὸν

(since they adapt their works to the poor standard of pleasure of the judges, which means that the spectators are the teachers of the poets), but it has corrupted also the pleasures of the audience; for whereas they ought to be improving their standard of pleasure by listening to characters superior to their own, what they now do has just the opposite effect. What, then, is the conclusion to be drawn from this survey? Is it this, do you suppose? What? This is, I imagine, the third or fourth time that our discourse has described a circle