ΙΣΤΟΡΙΩΝ Ζ, Κεφ. α′. ΖΗΝΩΝ

Λέγουσι δὲ μόνον τὸ καλὸν ἀγαθὸν εἶναι, καθά φησιν Ἑκάτων ἐν τῷ τρίτῳ Περὶ ἀγαθῶν καὶ Χρύσιππος ἐν τοῖς Περὶ τοῦ καλοῦ· εἶναι δὲ τοῦτο ἀρετὴν καὶ τὸ μετέχον ἀρετῆς, ᾧ ἐστιν ἴσον τὸ πᾶν ἀγαθὸν καλὸν εἶναι καὶ τὸ ἰσοδυναμεῖν τῷ καλῷ τὸ ἀγαθόν, ὅπερ ἴσον ἐστὶ τούτῳ. ἐπεὶ γάρ ἐστιν ἀγαθόν, καλόν ἐστιν· ἔστι δὲ καλόν· ἀγαθὸν ἄρα ἐστί. δοκεῖ δὲ πάντα τὰ ἀγαθὰ ἴσα εἶναι καὶ πᾶν ἀγαθὸν ἐπʼ ἄκρον εἶναι αἱρετὸν καὶ μήτʼ ἄνεσιν μήτʼ ἐπίτασιν ἐπιδέχεσθαι. τῶν δʼ ὄντων φασὶ τὰ μὲν ἀγαθὰ εἶναι, τὰ δὲ κακά, τὰ δʼ οὐδέτερα.