In OT291 The Jewish Trinity: How the Old Testament Reveals the Christian Godhead, Dr. Michael Heiser explores the identity and role of the Godhead in the Old Testament. He discusses the notion that “Two Powers in heaven”—Yahweh and the “second Yahweh figure”—are present throughout the Old Testament, with this second Yahweh figure referred to as the Angel of the Lord, the Name, and the Presence.
Dr. Heiser comments, “There are certain passages in the Old Testament that sounded to the ear like the God of Israel was two. There was this two-ness but yet one sort of idea going on. Rabbis took note of this and referred to the idea as Two Powers being in heaven.” While the Two Powers are evident throughout the Old Testament, there are also hints of the Trinity.