God is not defiled by pure flesh
Chrysostom is answering pagan and Manichaean mockery of the Incarnation by arguing that God is not defiled by dwelling in pure flesh, any more than the sun is defiled by its rays touching filth.
For they themselves dare to bring down the substance of God even into cats and dogs, and many of the heretics into things still more dishonorable than these. But we neither say any of these things, nor would we ever endure to hear them. What we say is this: Christ took up pure flesh, holy and blameless and untouched by all sin, from a virgin womb, and he set right his own creature. And those men, along with the Manichaeans who share their impiety, bring the substance of God into dogs and apes and beasts of every kind—for they say the soul in all these comes from that substance—yet they do not shudder or sink down in shame. But they say that we speak things unworthy of God, because we do not allow any of these things even to enter our mind, and we say what was fitting and proper for him: that he came and set right his own work by this manner of birth. Tell me, man, what are you saying? You say that the soul of murderers and sorcerers is from the substance of God, and you dare to accuse us because we do not endure any of these things, nor do we bear to hear them said, but we judge those who say them to be partners in impiety? What we say is this: God built for himself a holy temple, and through it he brought the citizenship of the heavens into our life. And how would you not be worthy of ten thousand deaths, both for the accusations you bring against us and for the impieties you never stop committing? For if it is unbecoming for God to dwell in a pure and blameless body, as you say, it is far more unbecoming for him to dwell in the body of a sorcerer, a grave-robber, a robber, an ape, a dog—not in the holy and blameless body that now sits at the right hand of the Father. For what harm could come to God from this plan of salvation, or what stain? Do you not see this sun, whose body is perceptible and corruptible and perishable, even if Greeks and Manichaeans choke ten thousand times when they hear these things? And not only the sun, but the earth and the sea and all visible creation is subjected to vanity. Listen to Paul making this clear when he says: 'For the creation was subjected to vanity, not willingly, but because of him who subjected it in hope' (Romans 8:20). Then, showing what it means to be subjected to vanity, he adds: 'Because the creation itself also will be delivered from the bondage of corruption into the glorious liberty of the children of God' (Romans 8:21). So now it is perishable and corruptible; for to be enslaved to corruption is nothing other than to be corruptible. If then the sun, being a corruptible body, sends out its rays everywhere and has dealings with mire and pollutions and many other such things, yet suffers no harm to its own purity from contact with bodies, but draws back its rays still pure, sharing its own excellence with many of the bodies that receive it while taking on not even the slightest stench or pollution—how much more the Sun of Righteousness, the Lord of the bodiless powers, when he came into pure flesh, was not only not defiled, but made that very flesh purer and holier.
Greek
Αὐτοὶ γὰρ καὶ εἰς αἰλούρους καὶ κύνας, πολλοὶ δὲ τῶν αἱρετικῶν καὶ εἰς ἔτι τούτων ἀτιμότερα τοῦ Θεοῦ κατάγειν τολμῶσι τὴν οὐσίαν. Ἡμεῖς δὲ τούτων μὲν οὐδὲν οὔτε λέγομεν, οὔτε ἀκοῦσαί ποτε ἂν ἀνασχοίμεθα· ἐκεῖνο δέ φαμεν, ὅτι καθαρὰν σάρκα καὶ ἁγίαν καὶ ἄμωμον καὶ ἁμαρτίᾳ ἁπάσῃ γεγενημένην ἄβατον ἐκ παρθενικῆς μήτρας ἀνέλαβεν ὁ Χριστὸς, καὶ τὸ οἰκεῖον διωρθώσατο πλάσμα. Κἀκεῖνοι μὲν, καὶ οἱ τὰ αὐτὰ ἀσεβοῦντες αὐτοῖς Μανιχαῖοι, εἰς κύνας καὶ πιθήκους καὶ θηρία παντοδαπὰ τὴν οὐσίαν εἰσάγοντες τοῦ Θεοῦ (τὴν γὰρ ψυχὴν τούτοις ἅπασιν ἐκ τῆς οὐσίας ἐκείνης εἶναί φασιν), οὐ φρίττουσιν οὐδὲ καταδύονται, ἡμᾶς δὲ ἀνάξια τοῦ Θεοῦ λέγειν φασὶν, ὅτι τούτων μὲν οὐδὲν οὔτε εἰς νοῦν λαβεῖν ἀνεχόμεθα· ὃ δὲ αὐτῷ πρέπον ἦν καὶ προσῆκον, λέγομεν, ὅτι τὸ οἰκεῖον ἔργον ἐλθὼν διωρθώσατο τῷ τῆς γεννήσεως ταύτης τρόπῳ. Τί λέγεις, εἰπέ μοι, ὦ ἄνθρωπε; Τὴν τῶν ἀνδροφόνων ψυχὴν καὶ τὴν τῶν γοήτων τῆς οὐσίας εἶναι λέγων τοῦ Θεοῦ, ἡμῖν τολμᾷς ἐγκαλεῖν, ὅτι τούτων μὲν οὐδὲν ἀνεχόμεθα, οὔτε ὑπομένομεν ἀκοῦσαι λεγόμενον, ἀλλὰ καὶ τοὺς λέγοντας ἀσεβείας κρίνομεν μετόχους· ἐκεῖνο δέ φαμεν, ὅτι ναὸν ἅγιον ἑαυτῷ κατασκευάσας ὁ Θεὸς, δι' ἐκείνου τὴν τῶν οὐρανῶν πολιτείαν εἰς τὸν βίον εἰσήγαγε τὸν ἡμέτερον. Καὶ πῶς οὐκ ἂν εἴητε μυρίων θανάτων ἄξιοι, καὶ ὑπὲρ τῶν ἐγκλημάτων, ὧν ἡμῖν ἐγκαλεῖτε, καὶ ὑπὲρ τῶν ἀσεβημάτων, ὧν ἀσεβοῦντες οὐ παύεσθε; Εἰ γὰρ ἀπρεπὲς Θεῷ, σῶμα οἰκῆσαι καθαρὸν καὶ ἄμωμον, ὡς ὑμεῖς λέγετε· πολὺ μᾶλλον ἀπρεπέστερον, τὸ τοῦ γόητος, τὸ τοῦ τυμβωρύχου, τὸ τοῦ λῃστοῦ, τὸ τοῦ πιθήκου, τὸ τοῦ κυνὸς, οὐκ αὐτὸ τὸ ἅγιον καὶ ἄμωμον καὶ ἐν δεξιᾷ τοῦ Πατρὸς νῦν καθεζόμενον. Ποία γὰρ ἂν βλάβη τῷ Θεῷ γένοιτ' ἂν ἀπὸ τῆς οἰκονομίας ταύτης, ἢ ποία κηλίς; Οὐχ ὁρᾶτε τουτονὶ τὸν ἥλιον, οὗ τὸ σῶμά ἐστιν αἰσθητὸν καὶ φθαρτὸν καὶ ἐπίκηρον, κἂν μυριάκις ἀποπνίγωνται Ἕλληνες καὶ Μανιχαῖοι ταῦτα ἀκούοντες; Οὐχ οὗτος δὲ μόνον, ἀλλὰ καὶ γῆ, καὶ θάλασσα, καὶ πᾶσα ἁπλῶς ἡ ὁρωμένη κτίσις, τῇ ματαιότητι ὑποτέτακται. Καὶ ἄκουε Παύλου τοῦτο δηλοῦντος, ἐν οἷς φησι· Τῇ γὰρ ματαιότητι ἡ κτίσις ὑπετάγη, οὐχ ἑκοῦσα, ἀλλὰ διὰ τὸν ὑποτάξαντα ἐπ' ἐλπίδι. Εἶτα δηλῶν, τί ποτέ ἐστι, ματαιότητι ὑποταγῆναι, ἐπήγαγε, λέγων· Ὅτι καὶ αὐτὴ ἡ κτίσις ἐλευθερωθήσεται ἀπὸ τῆς δουλείας τῆς φθορᾶς εἰς τὴν ἐλευθερίαν τῆς δόξης τῶν τέκνων τοῦ Θεοῦ. Ὥστε νῦν ἐπίκηρός ἐστι, καὶ φθαρτή ἐστι· τὸ γὰρ τῇ φθορᾷ δουλεύειν οὐδὲν ἕτερόν ἐστιν, ἢ φθαρτὸν εἶναι. Εἰ τοίνυν ὁ ἥλιος, σῶμα φθαρτὸν ὢν, πανταχοῦ τὰς ἀκτῖνας ἀφίησι, καὶ βορβόροις καὶ μολυσμοῖς καὶ πολλοῖς ἄλλοις τοιούτοις ὁμιλῶν πράγμασι, οὐδὲν ἀπὸ τῆς ὁμιλίας τῶν σωμάτων εἰς τὴν οἰκείαν καθαρότητα παραβλάπτεται, ἀλλὰ καὶ καθαρὰς συστέλλει τὰς ἀκτῖνας πάλιν, τῆς οἰκείας ἀρετῆς πολλοῖς τῶν ὑποδεξαμένων αὐτὸν σωμάτων μεταδιδοὺς, τῆς δὲ δυσωδίας καὶ τοῦ μολυσμοῦ οὐδὲ τὸ τυχὸν αὐτὸς προσλαμβάνων· πολλῷ μᾶλλον ὁ τῆς δικαιοσύνης ἥλιος, ὁ τῶν ἀσωμάτων δυνάμεων Δεσπότης, εἰς καθαρὰν σάρκα ἐλθὼν, οὐ μόνον οὐκ ἐμολύνθη, ἀλλὰ καὶ αὐτὴν ταύτην καθαρωτέραν, καὶ ἁγιωτέραν εἰργάσατο.