Tertullian

The very "stumbling-block" which he declares Christ to be "to the Jews," points unmistakeably to the Creator's prophecy respecting Him, when by Isaiah He says: "Behold I lay in Sion a stone of stumbling and a rock of offence." This rock or stone is Christ. This stumbling-stone Marcion retains still. Now, what is that "foolishness of God which is wiser than men," but the cross and death of Christ? What is that "weakness of God which is stronger than men," but the nativity and incarnation of God? If, however, Christ was not born of the Virgin, was not constituted of human flesh, and thereby really suffered neither death nor the cross there was nothing in Him either of foolishness or weakness; nor is it any longer true, that "God hath chosen the foolish things of the world to confound the wise; "nor, again, hath "God chosen the weak things of the world to confound the mighty; "nor "the base things" and the least things "in the world, and things which are despised, which are even as nothing" (that is, things which really are not), "to bring to nothing things which are" (that is, which really are).