Question 3: How many persons are there in God? Answer: There are three persons in the one true and living God: the Father, the Son, and the Holy Spirit. They are the same in substance, equal in power and glory. What would we lose if our faith was one of bare theism instead of Trinitarian theism? In other words, how would our entire theology be different if we believed in one God, but not in the Trinity? One major difference would be our understanding of who God is in himself.