Gonzalez Lodge, Commentary on Plato: Gorgias

τὸν ἀγῶνα: brings up before us at once the public games, at which a prize was awarded. The name is quite applicable to the progress of human life, which is really a contest between different systems as practised by different men. Cf. the passage from Phaedo quoted on 527 e. But a judicial trial was also called ἀγών, and such a one awaits every man at the last judgment. Cf. Apol. 34 c εἰ ὁ μὲν καὶ ἐλάττω τουτουὶ τοῦ ἀγῶνος ἀγῶνα ἀγωνιζόμενος ἐδεήθη.

ὅτι οὐχ οἷός τ᾽ ἔσει κτἑ.: corresponds closely to the objections urged by Callicles in 486 a, b, νῦν γὰρ εἴ τις σοῦ λαβόμενος κτἑ. In what follows, the words καὶ ἐπὶ κόρρης express even an augmentation of the insult.