This question comes from verses like: “But from now on the Son of Man shall be seated at the right hand of the power of God.”” (Luke 22:69, ESV). From numerous places we see that son of man and son of God both refer to Jesus. It helps us with “And we know that the Son of God has come and has given us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life.” (1 John 5:20, ESV) It means God [the father] is God and his son, Jesus, is God. Not two gods, but one god. This comes from one of the most revered passage of the Bible by the children of Israel was ““Hear, O Israel: The Lord our God, the Lord is one.” (Deut. 6:4, ESV) Hence, a core tenet of God is his oneness. Personhood is the philosophical concept that helped us grasp the son and the father being separate, but one – separate persons, not separate Gods. Being seated on the right of the Father-God helps us visualize the importance and power, and the close relationship of God the son to God the father. This is a mystery of God that will only be revealed to us on the last day when the Son is seen descending from the clouds in all his heavenly glory. Until then, we rely on what we know and trust in the one true God, the one we describe as triune. But, for brevity, we’ll save the topic of God the Holy Spirit (the third person of God) for another blog.