Creating The Devil

ΕΡΩΤ ΛϚ’ Διὰ τί δὲ τὸν διάβολον ἐποίησεν, εἰδὼς τοιοῦτον ἐσόμενον; Ο Θεὸς πᾶσαν τῶν ἀσωμάτων τὴν φύσιν έδημιούργησε, λογικὴν αὐτὴν καὶ ἀθάνατον ἀποφήνας· τοῦ λογικοῦ δὲ τὸ αὐτεξούσιον ἴδιον. Τούτων δὲ οἱ μὲν τὴν περὶ τὸν ποιητὴν ἐφύλαξαν εὔνοιαν, οἱ δὲ εἰς πονηρίαν ἀπέκλιναν. Τοῦτο δὲ καὶ ἐπὶ τῶν ἀνθρώπων ἔστιν εὑρεῖν. Οἱ μὲν γάρ εἰσι τῆς ἀρετῆς ἐρασταὶ, οἱ δὲ τῆς κακίας εργάται. Εἰ τοίνυν μέμφεταί τις τῇ τῶν πονηρῶν δημιουργίᾳ, ἀποστερεῖ ἄρα τῶν τῆς νίκης βραβείων τοὺς τῆς ἀρετῆς ἀθλητάς. Εἰ γὰρ μὴ ἐν τῇ αἱρέσει τῆς γνώμης εἶχον τὸν πόθον τῆς ἀρετῆς, ἀλλὰ ἐμπεφυκὸς τὸ ἄτρεπτον, ἔλαθον ἂν οἱ ἀξιόνικοι τῆς εὐσεβείας ἀγωνισταί· ἐπειδὴ δὲ τὴν αἵρεσιν τῶν ἀγαθῶν, καὶ τῶν ἐναντίων, ἔχει ἡ γνώμη, δικαίως καὶ οὗτοι τυγχάνουσι τῶν νικηφόρων στεφάνων, κἀκεῖνοι δίκας τιννύουσιν ὑπὲρ ὧν κατὰ γνώμην ἐξήμαρτον. Θεοδώρητος Ἐπίσκοπος Κύρρος, Εἰς Τὴν Γένεσιν Source: Migne PG 80.132b-c

Question 36 Why did God create the devil when He knew what would come to be? God created the whole incorporeal nature, making it rational and immortal, and it is the special property of rationality that it has free will. So it was that some of them cleaved to the benevolence of God and others fell into wickedness, which it is possible to observe even among men, for some are lovers of virtue and others exert themselves in wickedness. If, then, someone is troubled by the creation of wicked things, he deprives the athlete of virtue of the rewards of victory, for if in the choices of the will they had no desire for virtue, but their nature was fixed for it, they would be utterly ignorant of the excellence of the holy athlete, but when the will has the choice of good and evil, some rightly gain the crown of victory, and those who do not choose such things suffer punishment. Theodoret of Cyrrhus, Questions On Genesis