Jerome : (Verse 4) Because of my servant Jacob, and Israel my chosen one, I have called you by your name: I have likened you to myself, and you have not known me. These things, he says, I attribute to you because of my servant Jacob, and my chosen Israel, and I called you by your name, just as I called Abraham, Isaac, and Jacob; and long before, I foretold you, Isaac and Josiah, so that you would not think that he is the Christ, to whom you are compared, and in whose type and image you have preceded. But you did not know me, that is, you worshiped idols, not God. — Commentary on Isaiah