“The entire Old Testament contains nothing but Christ as he is preached in the gospel. Therefore we see how the apostles adduce testimony from the Bible and how in this manner they prove everything that is to be preached and to be believed concerning Christ. … Thus we see that the law and the prophets, too, cannot be preached or recognized properly, unless we see Christ wrapped up in the Scriptures.”

Martin Luther. ‘The Gospel for Christmas Eve’ from the Christmas Postil. Luther’s Works, American Edition, vol. 52. (Philadelphia: Fortress Press, 1974), p. 21-22.