Isaiah 42:6

Since, therefore, we were as though blind before, and when we sat as though enclosed by the prison house of foolishness in the darkness, not knowing God and his truth, we were enlightened by him who adopted us by his gracious treatment (his will in our favor). And when he had freed us as from evils and bonds and brought us into the light of wisdom, he recognized us as the heirs of his heavenly kingdom.

Moses then received it, but they proved themselves unworthy. Learn now how we have received it. Moses, as a servant, received it; but the Lord himself, having suffered in our behalf, hath given it to us, that we should be the people of inheritance. But He was manifested, in order that they might be perfected in their iniquities, and that we, being constituted heirs through Him, might receive the testament of the Lord Jesus, who was prepared for this end, that by His personal manifestation, redeeming our hearts (which were already wasted by death, and given over to the iniquity of error) from darkness, He might by His word enter into a covenant with us. For it is written how the Father, about to redeem us from darkness, commanded Him to prepare a holy people for Himself. The prophet therefore declares, "I, the Lord Thy God, have called Thee in righteousness, and will hold Thy hand, and will strengthen Thee; and I have given Thee for a covenant to the people, for a light to the nations, to open the eyes of the blind, and to bring forth from fetters them that are bound, and those that sit in darkness out of the prison-house." Ye perceive, then, whence we have been redeemed.

(Verses 6-7) I, the Lord, have called you in righteousness; I will take hold of your hand. I will keep you and will make you to be a covenant for the people and a light for the Gentiles, to open eyes that are blind, to free captives from prison and to release from the dungeon those who sit in darkness. Therefore, he to whom such great praises are sung has spoken these words to him, whose law the islands await and the nations: I am the Lord who called you in righteousness; of whom he himself speaks in the Gospel, Father, the world does not know you (John XVII, 25); so that he may be not only the God of the Jews, but also of the Gentiles. And I took hold of your hand, for whatever the Son does, the Father does also. And I saved you, who preserves all things yourself. And I gave you into a covenant with the people of Israel, to whom I had promised that you would come. And into the light of the Gentiles, who were sitting in darkness and in the shadow of death, so that you would open the eyes of the blind who had not seen God before. And you would bring out those who were bound in confinement (Prov. 2:16); for each one is bound by the cords of their own sins. And in the Gospel, which Satan had bound, the Lord set free (Matt. VIII). Those sitting in the darkness of the prison house, who were dwelling in the night of error and darkness.