It seems the standard tired question trinitarians ask of Oneness: is what about the baptism of Jesus? The Trinitarian will point to the three manifestations present at the baptism as proof positive that there are three persons of God. But is that the actual case and does it prove three persons? I say with a resounding No, it does not.
What is present at Jesus Baptism are: the voice of God from heaven, The spirit manifested as a dove, and Jesus in the water. They were all temporary manifestations at least the voice and the dove as a sign and as proof as to whom Jesus was.
John 1:32-34
32John testified saying, "I have seen the Spirit descending as a dove out of heaven, and He remained upon Him. 33"I did not recognize Him, but He who sent me to baptize in water said to me, 'He upon whom you see the Spirit descending and remaining upon Him, this is the One who baptizes in the Holy Spirit.' 34"I myself have seen, and have testified that this is the Son of God."
We do not have three persons of God being seen in the passage whatsoever as no such doctrine exists in scripture anywhere. We have a Voice (Not a person) the same spirit of God manifesting himself as the voice also manifesting himself as a dove (Not a person either) and we have Jesus in the water A person. The question remains then are these manifestation different persons of God? Or are the manifestation of the one God in three different areas or ways that God chose to reveal himself?
If these were three persons of God why is this vague alluding to a voice and a dove the standard number of persons set for God?
Revelation 1:4
John to the seven churches that are in Asia: Grace to you and peace from him who is and who was and who is to come, and from the seven spirits who are before his throne,
Revelation 3:1
And unto the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead.
Revelation 5:6
And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth.
Isaiah 11:2
And the spirit of the LORD shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the LORD;
The above passage shows perfectly the completeness of God in The Lord Jesus Christ in the fullness of the Godhead bodily in quality. Oneness does not consider the scriptures to teach multiple persons anywhere, nor does it even allude to the false doctrine. The doctrine of the trinity and three persons of God is an oral non- scriptural tradition of men on the very same level as Maryology and Popery and is not sola scriptua.