Frédéric Manns affirms that Justin Martyr’s conception of the nature of the Old Testament differed from that of the Jewish community. Jewish groups held to a three-level hierarchy of decreasing authority: Law, Prophets, and Writings. In contrast, Justin Martyr held to the entire OT as equally authoritative with all of it prophetically pointing to Christ. This paper will argue that there was a historical development, starting with the teachings of Jesus Christ, which led to a change in how Christians understood the nature of the authority of the OT compared to other groups. The historical development is twofold. Before the teachings of Jesus Christ, there was a stable tri-partite division of the OT. Although the evidence demonstrates a tri-partite canon in 200.00 B.C., it is unclear whether the Law, Prophets, and Writings held differing levels of sanctity at that time. So, one branch of historical development is the demonstrated differing levels of sanctity in the second-century A.D. Jewish midrash. The other branch of development is the Christian treatment of the entirety of the OT as pointing to Christ which led to many writers speaking more generally about γραφή instead of ὁ νόμος καὶ αἱ προφητεῖαι καὶ τὰ λοιπὰ τῶν βιβλίων.