Plato, Laws 731b

ἀγύμναστον τὴν πόλιν ὅλην εἰς ἅμιλλαν ἀρετῆς ποιῶν, σμικροτέραν αὐτὴν πρὸς εὐδοξίαν τὸ ἑαυτοῦ μέρος ἀπεργάζεται. θυμοειδῆ μὲν δὴ χρὴ πάντα ἄνδρα εἶναι, πρᾷον δὲ ὡς ὅτι μάλιστα. τὰ γὰρ τῶν ἄλλων χαλεπὰ καὶ δυσίατα ἢ καὶ τὸ παράπαν ἀνίατα ἀδικήματα οὐκ ἔστιν ἄλλως ἐκφυγεῖν ἢ μαχόμενον καὶ ἀμυνόμενον νικῶντα καὶ τῷ μηδὲν ἀνιέναι κολάζοντα, τοῦτο δὲ ἄνευ θυμοῦ γενναίου ψυχὴ πᾶσα

to be ill-trained for competing in excellence, and renders it, for his part, less large in fair repute. Every man ought to be at once passionate and gentle in the highest degree. For, on the one hand, it is impossible to escape from other men’s wrongdoings, when they are cruel and hard to remedy, or even wholly irremediable, otherwise than by victorious fighting and self-defence, and by punishing most rigorously; and this no soul