Plato, Meno 95a

πάνυ· οἶμαι δὲ σὲ καὶ αὐτὸν εἰδέναι. ὦ Μένων, Ἄνυτος μέν μοι δοκεῖ χαλεπαίνειν, καὶ οὐδὲν θαυμάζω· οἴεται γάρ με πρῶτον μὲν κακηγορεῖν τούτους τοὺς ἄνδρας, ἔπειτα ἡγεῖται καὶ αὐτὸς εἶναι εἷς τούτων. ἀλλʼ οὗτος μὲν ἐάν ποτε γνῷ οἷόν ἐστιν τὸ κακῶς λέγειν, παύσεται χαλεπαίνων, νῦν δὲ ἀγνοεῖ· σὺ δέ μοι εἰπέ, οὐ καὶ παρʼ ὑμῖν εἰσιν καλοὶ κἀγαθοὶ ἄνδρες; πάνυ γε.

I think you know that yourself. Meno, I think Anytus is angry, and I am not at all surprised: for he conceives, in the first place, that I am speaking ill of these gentlemen; and in the second place, he considers he is one of them himself. Yet, should the day come when he knows what speaking ill means, his anger will cease; at present he does not know. Now you must answer me: are there not good and honorable men among your people also? Certainly.