Isaiah 57:15

By these names the kindness of God shows that he is supreme. For those sharing in these titles have made him to be low, consorting with idols and demons. Although he is holy, these people blaspheme his name with evil desires and deeds that are not honorable. He says, I am holy, and I rejoice with the holy as I sanctify them, stirring up their power and rousing them in their attitudes, providing they show themselves to be worthy and demonstrate their wills to be contrite and penitent. For to such I will grant eternal life.Revenge is meant in the sense that God will give sinners over to troubles so that they receive discipline. God does these things, yet also he spares our race in his compassion. God shows his compassion in these instances of recompense by only disciplining us a little, given the large amount of our sins.

The blessed prophets, when the Lord of the universe promises what is great and godly to them, were filled with much wonder at his glory and clemency and, as if responding from excitement, they run to give praise. We find the prophet doing precisely that here. The Lord says these things but has to add, "the exalted," that is, he who is by nature over and above all things that have come to be. "I dwell in the high places" means again that he is in the unshakeable upper reaches and that this divine and lofty nature is in the ineffable transcendence that is above. However, I think that this, the divine nature's dwelling in the exalted places, is forever. For it exists without change in these places by itself, and there is nothing in better conditions than it is, but rather the being that is in these conditions unchangingly exists unceasingly.

(Verse 15) For thus says the high and lofty One who inhabits eternity, whose name is Holy: I dwell in the high and holy place, with him who has a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite. LXX: Thus says the high and lofty One who inhabits eternity, whose name is Holy: I dwell in the high and holy place, and also with him who is of a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite. The prophetic speech began against the people of the Jews, whose leaders he accused of being blind spies, mute dogs, ignorant shepherds, wicked sons, and the offspring of adulterers and prostitutes. After this, he came to Jerusalem, to which he reproached for its immorality, because it had spread its bed to its lovers, and had openly welcomed and adorned itself with all idols, and had sent envoys far away, in order to enjoy foreign lovers as well. With the rebuke finished, he came to those who trust in the Lord, and to whom he had promised to possess the land and the mountain, and for whom he had commanded the journey to be prepared for their return; undoubtedly the Apostles, in whose preaching they believed from both peoples. Hence he begins with the praises of God and testifies in the following discourse what he promised concerning the return of his people. For thus says the exalted and sublime Lord, who dwells in the highest places and is Holy in the Holy, not by place, but by the merit of those in whom he dwells, of whom one says in the psalm: I will exalt you, Lord, for you have upheld me (Ps. 29:1). And again: Exalt Yourself, O Lord, You who judge the earth (Ps. XCIII, 2); not so that God is lifted up by human words, but according to what is said elsewhere: The Lord has become my salvation (Ps. CXVII, 21), let Him also be exalted by the humble. He resists the proud and gives grace to the humble (James IV): so that He may lift them up and make them dwell in the heights. For the Lord is exalted, and He looks upon the lowly (Ps. CXXXVII, 6). And in the Gospel the angels cry out: Glory to God in the highest, and on earth peace (Luke II, 14). And again in the Psalms: Praise the Lord from the heavens: praise him in the highest. And not only does the Most High dwell in the highest, but the Holy One also dwells in the holy. As it is said elsewhere: Be holy; for I am…