Jerome : (Verse 10 and following) And the sons of strangers will build your walls, and their kings will serve you. In my indignation I struck you, but in my mercy I have shown you compassion; and your gates will always be open, never closed day or night, so that the strength of the nations may come to you and their kings may be brought. Indeed, any nation or kingdom that does not serve you will perish, and the nations will be devastated. For because of my anger I struck you, and because of my mercy I have loved you. And your gates shall always be open; they shall not be shut day or night, so that the strength of the nations may come to you, and their kings who are to be brought. For the nations and kings who do not serve you shall perish; the nations shall be devastated in their desolation. Among the many things with which the Church is enriched, and the city of the Savior is built, foreigners and sons of foreigners also build its walls, so that the enemy cannot enter and find a place for treachery. But aliens and foreigners properly signify the people of nations who have truly built the Church of Christ, to such an extent that their kings and princes serve and assist her. This is either understood in a literal sense or in a spiritual sense. If understood literally, we see that the Roman Caesars submit their necks to the yoke of Christ and build churches at public expense, and rely on the laws against the persecutions of the nations and the snares of the heretics. If, spiritually, those who possess self-control, eloquence, holiness, are leaders, and through the power of their souls subjugate the servitude of the flesh, they themselves govern and assist, they come to the aid of him whom he often abandons due to negligence or strikes with the rod of persecutors, so that again, out of his own mercy, he may love him. Or certainly this must be said, that he may reconcile to himself the once afflicted and handed over to captivity among the people of the Jews, in the calling of the Gentiles, so that its gates may always be open, and neither day nor night be closed, and may continually be open to those who desire salvation, that is, that the entrance may not be denied to those who wish to believe in joy and in tribulation. And let strength be brought to her, whether it be the wealth of nations; and let her kings serve her or be led to her as captives. Then you will understand, when you see the most eloquent being brought to the faith of Christ; and the folly of the wisdom of the wise becoming foolish, and the prudence of the prudent being rejected (1 Corinthians 1): so that the wisdom of God may be wiser than men. But the nations and their kings who refuse to serve the Church in good and useful service, in order to be transferred into the Apostolic dignity, will perish in the destruction that is prepared for the wicked, and whatever is in them will be reduced to solitude, for they have refused to receive God as their guest. — Commentary on Isaiah Theodoret of Cyrus : Cyrus ordained the reconstruction of Jerusalem, but the work remained unfinished. Under Darius, the son of Hystapis, only the temple of God was reconstructed. Under Artaxerxes the Long-armed, Nehemiah—who was not a stranger but a Jew—was engaged in the reconstruction of the walls. The money that he possessed to cover the expense was not provided from royal riches, but he had gathered it as the result of a collection; and, after the conquest of the Jews, the Roman emperors rebuilt the walls of Jerusalem. Whoever would wish, however, to understand [the text] more precisely will find that these are the teachers who have come from foreign nations who watch over it and guard it by their prayers and their instructions. "For by reason of my wrath I struck you, and by reason of mercy I loved you." That applies both to the ancient Jerusalem, which had been destroyed by reason of [their] sins, and to the reconstruction by reason of the singular [divine] benevolence, and to the church of God, which was formerly like a desert, since it did not benefit from divine solicitude but which has enjoyed the result of the Savior's providence. — COMMENTARY ON Isaiah 19:60.10