The inspired Scriptures do not present Jesus Christ merely as a Davidic monarch, a plenipotentiary of God, or an exalted creature. They present him as God Almighty incarnate — the eternal King who was, is, and is to come. This article examines the Hebrew and Greek evidence from the Old and New Testaments, traces the patristic reception of these texts, and demonstrates that the eternal reign of YHWH and the eternal reign of Christ are one and the same reign, because Christ is one and the same God.