Plato, Laws 904b

θεοί—γένεσις γὰρ οὐκ ἄν ποτε ἦν ζῴων ἀπολομένου τούτοιν θατέρου—καὶ τὸ μὲν ὠφελεῖν ἀεὶ πεφυκός, ὅσον ἀγαθὸν ψυχῆς, διενοήθη, τὸ δὲ κακὸν βλάπτειν· ταῦτα πάντα συνιδών, ἐμηχανήσατο ποῦ κείμενον ἕκαστον τῶν μερῶν νικῶσαν ἀρετήν, ἡττωμένην δὲ κακίαν, ἐν τῷ παντὶ παρέχοι μάλιστʼ ἂν καὶ ῥᾷστα καὶ ἄριστα. μεμηχάνηται δὴ πρὸς πᾶν τοῦτο τὸ ποῖόν τι γιγνόμενον ἀεὶ ποίαν ἕδραν δεῖ μεταλαμβάνον οἰκίζεσθαι καὶ τίνας ποτὲ τόπους· τῆς δὲ γενέσεως τοῦ

there would never have been generation of living creatures), and since He perceived that all soul that is good naturally tends always to benefit, but the bad to injure,—observing all this, He designed a location for each of the parts, wherein it might secure the victory of goodness in the Whole and the defeat of evil most completely, easily, and well. For this purpose He has designed the rule which prescribes what kind of character should be set to dwell in what kind of position and in what regions; but the causes of the generation of any special kind he left to the wills