The problem/contradiction that you are not seeing is that
If Jesus is a diety and the Father is that same diety (God) the only God beared witness.
God is one witness and there would be no other but God. If you try to make it two witnesses it has to be two gods or else only God beared witness...
His Father (He whom spoke/birthed the Word) if I refer to Aineo's spirit. I can say his spirit and it does not make Aineo and his spirit two separate people...