ὅτι μὲν οὖν ἐστὶν ἡ ἀρετὴ ἡ ἠθικὴ μεσότης, καὶ πῶς, καὶ ὅτι μεσότης δύο κακιῶν, τῆς μὲν καθʼ ὑπερβολὴν τῆς δὲ κατʼ ἔλλειψιν, καὶ ὅτι τοιαύτη ἐστὶ διὰ τὸ στοχαστικὴ τοῦ μέσου εἶναι τοῦ ἐν τοῖς πάθεσι καὶ ἐν ταῖς πράξεσιν, ἱκανῶς εἴρηται. διὸ καὶ ἔργον ἐστὶ σπουδαῖον εἶναι. ἐν ἑκάστῳ γὰρ τὸ μέσον λαβεῖν ἔργον, οἷον κύκλου τὸ μέσον οὐ παντὸς ἀλλὰ τοῦ εἰδότος· οὕτω δὲ καὶ τὸ μὲν ὀργισθῆναι παντὸς καὶ ῥᾴδιον, καὶ τὸ δοῦναι ἀργύριον καὶ δαπανῆσαι· τὸ δʼ ᾧ καὶ ὅσον καὶ ὅτε καὶ οὗ ἕνεκα καὶ ὥς, οὐκέτι παντὸς οὐδὲ ῥᾴδιον· διόπερ τὸ εὖ καὶ σπάνιον καὶ ἐπαινετὸν καὶ καλόν.