What is the Oneness of God doctrine (Modalism)? Why are Oneness beliefs not biblical and not supported by the New Testament and the Old Testament? In this presentation of the Trinity doctrine vs the Oneness of God (Modalism) debate we examine what the Bible teaches on the nature and identity of God is according to the New Testament and the Old Testament Scriptures. Is God only 1 person with 3 modes or forms or manifestations as Oneness proponents claim or does the Bible teach there is one God who has been revealed through 3 distinct persons as the Father, the Son (Jesus Christ), and the Holy Spirit?