It is very useful to understand Jesus Christ in different levels of consciousness. We can see four levels: Jesus Christ identified with his physical body, a human being, a man. Secondly Jesus Christ identified with his Jewish belief system. He was Jew. thirdly Jesus Christ who transcended his Jesus identity and realized to be universal. Fourthly Jesus Christ identified with God.
Let us use the analogy of tree. A tree has leaves,branches,trunk and the roots. Leaves represent individuality, physical. Branches represent collective consciousness, religions or belief systems. Trunk represents universal consciousness. Roots represent divine consciousness.
First Jesus Christ as a physical human being is a leaf. As a Jew he was living according to the precepts of the Jewish branch. At the moment of his baptism he transcended the Jewish branch and entered into the consciousness of the Trunk. Finally his awareness entered into the roots realizes being one with God. His awareness has to return to the leaf level. But the life in the life manifest the spirit of the roots,divine. His humanity becomes the vehicle of the divine. Jesus Christ is the whole tree. His first two levels,body and religious identity belong to the process of time and space. His other two levels the trunk and the roots belong to his eternal level. He is fully human in one level and fully divine in other level. His humanity is a vehicle for his divine level. At the level of the roots his consciousness is one with the divine.At the level of the leaves his consciousness is one with his body, with his humanity.
The expression son of God has to be understood from different levels. The word 'son' is more metaphorical than metaphysical. At the level of a leaf, body, Jesus is a son of God. At the level of the branch Jesus, as a Jew, is a collective son of God. Here it is not one individual but the whole people of Israel, as one son of God. God says, I have called my son, out of Egypt.. Here the expression 'son' refers to the whole people of Israel. At the level of the trunk, it is the universal son of God. The universal Son of God is one who stands before God representing the whole of humanity and of creation. The Son of God speaks to the whole of humanity and creation in the name of God. The Son of God says, I am in God and God is in me. He says. I am in the Father and Father is in the Son. The Father is like the Sun and the Son is like the Moon. The Spirit of the Sun reflects in the Moon. The expression of Trinity belongs to this level. God is the Father, the universal consciousness is the Son and the reflection of the Father in the Son is the Holy Spirit.
Finally at the level of the roots, Jesus Christ consciousness is one with God. There is only one God.
The problem comes only when we project the third level to the fourth level and say God is the Trinity, the Father, the Son and the Holy Spirit. Trinitarian experience of Jesus belong to the third level of consciousness.