Jerome : (Verses 12-13) I have declared and saved; I have made known, and there was no strange one among you. You are my witnesses, says the Lord, and I am God, and from the beginning I am myself, and there is no one who can rescue from my hand. I will work, and who can turn it aside? LXX: I have declared and saved: I have rebuked and there was no stranger among you. You are my witnesses, and I am the Lord God from the beginning, and there is no one who can deliver from my hand. I will do it, and who will turn it away? So when I foretell these things from the beginning, there will be no one who rejects my will: indeed, what I have done, they could make void. These things are indeed said to Jacob and Israel, but they refer to the apostolic choir and all who want to believe in Christ and be saved from the Jewish people. — Commentary on Isaiah Theodoret of Cyrus : I not only made the predictions; I have also brought them to their conclusion. "I reproached, and then there was no strange god among you." The three interpreters have rendered the word "I have reproached" by the verb "I have made to understand," which comes back to saying, I have born witness. The verb "I have made reproaches" also has the same sense: it is because they do not cease to sin that they suffer reproaches. Moreover, he then makes the following declaration: At the time when I gave the law, no strange god was present: "You are my witnesses, and I am the Lord God." Know clearly, he is saying, that no one else is concerned for you, but that you alone have benefited by my providence. — COMMENTARY ON Isaiah 13:43.12