Plato, Laws 632e

καθάπερ ἠρξάμεθα, τὰ τῆς ἀνδρείας πρῶτον ἐπιτηδεύματα, ἔπειτα ἕτερον καὶ αὖθις ἕτερον εἶδος τῆς ἀρετῆς διέξιμεν, ἐὰν βούλησθε· ὅπως δʼ ἂν τὸ πρῶτον διεξέλθωμεν, πειρασώμεθα αὐτὸ παράδειγμα θέμενοι καὶ τἆλλʼ οὕτω διαμυθολογοῦντες παραμύθια ποιήσασθαι τῆς ὁδοῦ, ὕστερον δὲ ἀρετῆς πάσης ἅ γε νυνδὴ διήλθομεν ἐκεῖσε βλέποντα ἀποφανοῦμεν, ἂν θεὸς ἐθέλῃ.

start from the beginning to explain first the institutions which have to do with courage; and after that we shall, if you wish, deal with a second and a third form of goodness. And as soon as we have completed our treatment of the first theme, we shall take that as our model and by a discussion of the rest on similar lines beguile the way; and at the end of our treatment of goodness in all its forms we shall make it clear, if God will, that the rules we discussed just now had goodness for their aim.