Jesus is God as human opening to us the mystery of who God is within himself. He alone unveils to us the One God as Father, Son and Spirit mutually indwelling one another as the community of love. As such, the One God is mystery beyond our knowing.
Jesus is God as human opening to us who God is in relation to us. As the God who is One within himself, the Triune Community created humans for union within his life. And only within this oneness with God would we ever be one with each other. Yes, the only way diverse humans could ever be one is within their relation of union within the Triune Communion.
We humans turned away from God alienating ourselves from the One who wants to live in the deepest union with us. Nevertheless, Jesus came among us as the union of God and man opening to us our participation in the mystery. For Jesus is the mystery of the One God among us in whom humans are gathered back into communion with God and with one another. In union with the God-human and communion (koinonia) in him, humans are restored to the relation of oneness with God.
We are now the body of Christ that lives in union with Jesus and his Father through his Spirit. Jesus said, “On that day (when the Spirit comes) you will realise that I am in my Father, and you are in me, and I am in you”. In this living union the mystery of union is made actual in the world., For as his body we are the new humanity that enjoys the union that God intended all along. Union with Father and Son in the Spirit and also union with one another. Within this new humanity, there is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all ONE in Christ Jesus (Galatians 3:28).