Since the subject of the Godhead is very detailed and would be impossible for us to write in a few paragraphs, we have decided to use the words of David K. Bernard of the UPCI.
One indivisible God. We cannot speak of "Gods" plural. We cannot speak of persons of God. If we mean by persons: multiple personalities, multiple minds, multiple wills, multiple bodies in the Godhead. In fact, I'd say you can't be in the Godhead. The Godhead is the quality of being God, and there is no one in the Godhead. The Godhead is not a substance; the Godhead is a person. The one true God known in the old testament as Jehovah, or Yahweh. The supreme name in which he revealed himself to Israel. When he manifested himself in the flesh, he revealed himself as Jesus. Which means, Jehovah Savior or Jehovah is salvation. So there is one indivisible God with no distinction of persons. That's my first point.
My second point is Jesus is the incarnation of that one undivided Godhead. He is not one of three persons, he is not a subordinate person, he is not a second person; he is the almighty. The Alpha and Omega, the beginning and the end. The incarnation of the fullness of God.