(Verse 18, 19.) Why have you made us err, O Lord, from your ways: you have hardened our heart, so that we would not fear you? Turn again for the sake of your servants, the tribes of your inheritance. Your holy people have possessed nothing: our enemies have trampled upon your sanctuary. We have become like in the beginning: when you did not rule over us, neither was your name invoked upon us. LXX: Why have you led us astray, O Lord, from your holy way: you have hardened our hearts, so that we would not fear you? Convert for the sake of your servants, for the sake of your inheritance, so that we may possess a little of your holy mountain: our adversaries have trampled your sanctuary: we have become as those who were not ruled by you from the beginning: nor has your name been invoked upon us. The letter that Paul writes to the Corinthians, when it is written to the people of a certain city, by reason of the diversity of its inhabitants, that is, of saints and sinners, now praises them, now corrects them, now teaches them, now rebukes them, provokes them to continence; he does not refuse marriage; he refrains from idolatry; he instructs them about the resurrection; he extends his hand to the divorced, so that he does not give a place to fornication. We have said this, so that we may understand that the present chapter, which is entirely covered by the prayer of the people, may be understood either as of the just or of sinners: and now to praise the Lord, now to bring a question to the Lord, and to attribute one's own guilt to God. Hence, even afterwards they speak of this: Why have you made us err, O Lord, from your ways, or have led us astray from your path: you have hardened our heart that we should not fear you? Not that God is the cause of error and hardness, but so that his patience, waiting for our salvation, may seem to be the cause of error and hardness by not punishing the wrongdoers. Being extremely angry with certain people, he refrained from striking them and said: 'I will not visit your daughters when they have committed fornication, and your wives when they have committed adultery' (Hosea IV, 14). He chastises every son whom he receives, and he strikes in order to correct (Hebrews XII). Finally, regarding those who have not lost the title of children but are drawn back to repentance through punishment, he says about them: 'I will visit their iniquities with a rod, and their sins with stripes; but I will not take away my mercy from them' (Psalm LXXXIX, 33). For there is a sorrow that leads to life, and there is a sorrow that leads to death. Hence the sinner speaks in the psalm: You have made our paths turn away from your way, and you have humbled us in a place of affliction (Psalm 44:19). And for forty years the people wander in the desert, so that they may not find the former way, nor return to the Egyptians (Numbers 32). Also in Hosea, the paths of Jerusalem are separated and closed with thorns, so that she may not follow her lovers, and being compelled by need, she may return to her former husband (Hosea 2). And it is said that the heart of Pharaoh was hardened, so that he would not let his people go, and that he would be afflicted with ten plagues (Exodus IV). This question was discussed in great detail by Paul to the Romans (Romans IX). And we have briefly addressed it in a certain work. Turn, O Lord, or turn us on account of your servants, Abraham and Israel, who do not know us, or whom we believe to be among the people. For our adversaries have possessed your holy people as if it were nothing and without any effort. Whether convert us, so that according to the Septuagint, we may possess a little of your holy mountain, because we cannot possess your whole mountain, so that when we have a part, we may come to its fullness and contemplate the glory of the Only Begotten from the Father, full of grace and truth (John 1). Concerning this, it is said in the same prophet: In the last days, the mountain of the Lord shall be revealed (Isaiah 2:2). But concerning what is stated above: Why have you made us stray (Isaiah 63:17)? Jeremiah teaches in the fullest sense in what meaning it is to be understood: You have seduced me, Lord, and I have been seduced: you have taken hold of me, and you have been able to ((Al. you have placed)) (Jeremiah 20:7). For while you promise me mercy, and as a merciful father you hide your severity, and as a skilled doctor you hide the sharpest iron, lest you frighten the sick before you cure them, you have made me negligent; therefore, God says about Jerusalem: Behold, I will seduce her, and I will make her like a desert, and I will lay her waste like a land without water, and I will speak to her heart: and I will give her belongings from there, and the valley of Achor for opening understanding (Hosea 1:14, 15). Let us consider the order of these things: he seduces her and makes her a deserted and without water, so that she suffers from thirst for virtues. After she has said: My soul thirsts for you, how greatly my flesh longs for you (Psalm 41:2), then he will speak to her heart and console her in mourning. And he will give her possession, that is, of repentance and sorrow that works salvation. And the humility of her troubled heart (for this is what the valley of Achor signifies) opens understanding, so that she may not ignore her Creator. The enemy, he says, have trampled upon your sanctuary. There is no doubt that it signifies the Temple, which the victorious Romans trod upon. And we have become as in the beginning before we were called in Abraham, and while we were in Egypt, having neither God, nor kings, nor princes, nor prophets, nor the Law of God's commandments (Ose. III), all of which were completed after the passion of the Lord, and are fulfilled even to this day. For when they said: His blood be upon us and upon our children (Matth. XXVII, 25), there remains an everlasting curse, and their God does not reign, nor is his name invoked above, since he is not at all called the people of God.
[AD 420] Jerome on Isaiah 63:18-19