Judea and Jerusalem: Isaiah mentions Judea and Jerusalem, and in this is nothing unusual. His discourse was a prophecy, momentarily obscured by the names that are indicated. For it is the same for Jacob, predicting this, in the same way Isaiah will now state it (cf. Gen 49:10-11). Is it then surprising that here too the prophet places the names of Judea and of Jerusalem in his predictions regarding the Church? As he addressed himself to the senseless people who killed the prophets, burned their books, overturned their altars, so it is reasonable that the veil would have been imposed on them in their reading of the Old Testament, according to the utterance of the blessed Paul, "But their minds were hardened. For until this day the same veil remains unlifted in the reading of the Old Testament, because the veil is taken away in Christ" 2 Cor 3:14.
(Chapter 2, Verse 1) The word that Isaiah, the son of Amos, saw concerning Judah and Jerusalem. And in the previous Vision, which we have already explained, where the Septuagint translates it, it is written in Hebrew as 'Al Juda Ujerusalem' (); and in this second one, it is likewise contained in Hebrew. And I wonder why the Septuagint interpreters said 'concerning Judah and Jerusalem' in that one, and 'about Judah and Jerusalem' in this one; unless perhaps because there it is called a sinful nation, a people full of sins, an evil seed, sons of iniquity, and princes of Sodom, and people of Gomorrah, and a harlot city, and other such things, they translated more for the sense rather than the word: and here, because prosperity is immediately promised: In the last days, the mountain of the Lord shall be revealed, and the house of God on the top of the mountains, not against Judah and Jerusalem, but about Judah and Jerusalem they understood the prophecy: since we also read in that one, after the threat of prosperity: I will restore your judges as at the first, and your counselors as in the beginning: after this you shall be called the city of righteousness, the faithful city; and in this one, after prosperity, there shall be a fierce threat. Behold, the Lord, the ruler of hosts, will take away from Jerusalem and from Judah the mighty and strong, all the strength of bread and all the strength of water, and the rest. Therefore, according to the Hebrew and in that vision, and in that discourse which Isaiah, the son of Amos, saw, it is to be understood about Judah and Jerusalem: not against Judah and Jerusalem, or for Judah and Jerusalem, as Symmachus translated: but absolutely, about Judah and Jerusalem, in which both joyful and sad things can be contained. And this should be considered, that there he may see a vision; here the Word, which was in the beginning with God: and in that place threatening the Jews, he may come for the salvation of the Gentiles; in this place, starting from the salvation of the Gentiles, punishing Israel, he may gather those who believe in Christ's Church from both callings.