God's hidden plan to save through the Son
The author is explaining how God, having already arranged everything with his Son, first let humanity be carried away by sin and then revealed his kindness by giving the Son as a ransom.
So when he had already arranged everything in his own mind together with his Son, he let us go on as we wished until the former time, carried along by disorderly impulses, by pleasures and desires. He was not at all rejoicing in our sins, but bearing with them. He was not approving the season of unrighteousness that then existed, but creating the present season of righteousness. His purpose was this: after we were convicted by our own works in that former time as unworthy of life, we might now be made worthy by the kindness of God, and after we had shown that we could not enter the kingdom of God by ourselves, we might become able to do so by the power of God.
But when our unrighteousness had reached its full measure and it had been made completely clear that its wages were expected to be punishment and death, then the time came that God had appointed to reveal at last his own kindness and power. Oh, the surpassing love of God for humanity! He did not hate us, or reject us, or remember our sins against us. Instead he was patient, he bore with us, and in his mercy he took our sins upon himself. He gave over his own Son as a ransom for us: the holy one for the lawless, the innocent one for the wicked, the righteous one for the unrighteous, the incorruptible one for the corruptible, the immortal one for the mortal.
For what else could cover our sins except his righteousness? In whom could we, lawless and impious as we are, be made righteous except in the Son of God alone? Oh, the sweet exchange! Oh, the unsearchable workmanship! Oh, the unexpected benefits! For the lawlessness of many was hidden in one righteous man, and the righteousness of one made many lawless people righteous.
So after he had convicted our nature in the former time of its inability to attain life, and had now shown the Savior able to save even what is impossible, he willed us to trust in his kindness from both of these things, and to regard him as nourisher, father, teacher, counselor, physician, mind, light, honor, glory, strength, and life, and not to worry about clothing and food.
Greek
Πάντ̓ οὖν ἤδη παῤ ἑαυτῷ σὺν τῷ παιδὶ οἰκονομηκώς, μέχρι μὲν τοῦ πρόσθεν χρόνου εἴασεν ἡμᾶς, ὡς ἐβουλόμεθα, ἀτάκτοις φοραῖς φέρεσθαι, ἡδοναῖς καὶ ἐπιθυμίαις ἀπαγομένους. οὐ πάντως ἐφηδόμενος τοῖς ἁμαρτήμασιν ἡμῶν, ἀλλ’ ἀνεχόμενος, οὐδὲ τῷ τότε τῆς ἀδικίας καιρῷ συνευδοκῶν, ἀλλὰ τὸν νῦν τῆς δικαιοσύνης δημιουργῶν, ἵνα ἐν τῷ τότε χρόνῳ ἐλεγχθέντες ἐκ τῶν ἰδίων ἔργων ἀνάξιοι ζωῆς νῦν ὑπὸ τῆς τοῦ θεοῦ χρηστότητος ἀξιωθῶμεν, καὶ τὸ καθ̓ ἑαυτοὺς φανερώσαντες ἀδύνατον εἰσελθεῖν εἰς τὴν βασιλείαν τοῦ θεοῦ τῇ δυνάμει τοῦ θεοῦ δυνατοὶ γενηθῶμεν.
ἐπεὶ δὲ πεπλήρωτο μὲν ἡ ἡμετέρα ἀδικία καὶ τελείως πεφανέρωτο, ὅτι ὁ μισθὸς αὐτῆς κόλασις καὶ θάνατος προσεδοκᾶτο, ἦλθε δὲ ὁ καιρός, ὃν θεὸς προέθετο λοιπὸν φανερῶσαι τὴν ἑαυτοῦ χρηστότητα καὶ δύναμιν ʽὢ τῆς ὑπερβαλλούσης φιλανθρωπίας καὶ ἀγάπης τοῦ θεοὖ, οὐκ ἐμίσησεν ἡμᾶς οὐδὲ ἀπώσατο οὐδὲ ἐμνησικάκησεν, ἀλλὰ ἐμακροθύμησεν, ἠνέσχετο, ἐλεῶν αὐτὸς τὰς ἡμετέρας ἁμαρτίας ἀνεδέξατο, αὐτὸς τὸν ἴδιον υἱὸν ἀπέδοτο λύτρον ὑπὲρ ἡμῶν, τὸν ἅγιον ὑπὲρ ἀνόμων, τὸν ἄκακον ὑπὲρ τῶν κακῶν, τὸν δίκαιον ὑπὲρ τῶν ἀδίκων, τὸν ἄφθαρτον ὑπὲρ τῶν φθαρτῶν, τὸν ἀθάνατον ὑπὲρ τῶν θνητῶν.
τί γὰρ ἄλλο τὰς ἁμαρτίας ἡμῶν ἠδυνήθη καλύψαι ἢ ἐκείνου δικαιοσύνη;
ἐν τίνι δικαιωθῆναι δυνατὸν τοὺς ἀνόμους ἡμᾶς καὶ ἀσεβεῖς ἢ ἐν μόνῳ τῷ υἱῷ τοῦ θεοῦ;
ὢ τῆς γλυκείας ἀνταλλαγῆς, ὢ τῆς ἀνεξιχνιάστου δημιουργίας, ὢ τῶν ἀπροσδοκήτων εὐεργεσιῶν: ἵνα ἀνομία μὲν πολλῶν ἐν δικαίῳ ἑνὶ κρυβῇ, δικαιοσύνη δὲ ἑνὸς πολλοὺς ἀνόμους δικαιώσῃ.
ἐλέγξας οὖν ἐν μὲν τῷ πρόσθεν χρόνῳ τὸ ἀδύνατον τῆς ἡμετέρας φύσεως εἰς τὸ τυχεῖν ζωῆς, νῦν δὲ τὸν σωτῆρα δείξας δυνατὸν σώζειν καὶ τὰ ἀδύνατα, ἐξ ἀμφοτέρων ἐβουλήθη πιστεύειν ἡμᾶς τῇ χρηστότητι αὐτοῦ, αὐτὸν ἡγεῖσθαι τροφέα, πατέρα, διδάσκαλον, σύμβουλον, ἰατρόν, νοῦν, φῶς, τιμήν, δόξαν, ἰσχύν, ζωήν, περὶ ἐνδύσεως καὶ τροφῆς μὴ μεριμνᾶν.