This paper seeks to examine Barth's ontology of holy scripture by appropriating the latest nomenclatural analysis of Barth's usage of Wesen and Sein. Given the difference between the Wesen and the Sein of the Bible, and the claim that the Sein-in-becoming of the Bible is determined by its Wesen-in-act, it follows that for Barth the Bible is ontologically the Word of God in the sense of Wesen, which underlies the Bible's becoming the Word of God in the sense of Sein. In short, the Bible ontologically becomes the Word of God in the sense of Sein because the Bible is the Word of God in the sense of Wesen.