This should explain it for ya, but I doubt you'll get it.
Well, it's nice of you to bless us dummies with your profound knowledge.
God is one and has always been one. Jesus is the man God became. Jesus did not exist before incarnation as God the Son. In His pre-incarnate state, He existed as the Father, God Himself. Now the two of them are in heaven together, God the Father and the man he became, the Son of God, Jesus Christ. The problem is that when I say the Father became a man people think it means I believe he stopped being an eternal Spirit after incarnation and that heaven was empty. This is not what I believe. God the Father continued to exist as a transcendent, unlimited Spirit, while also becoming a man. The Father did not become confined to a human existence. It is not as though the omnipresent Spirit of God transformed Himself into a man, to the exclusion of His existence as the Holy Spirit.
When God assumed a human existence with a complete human mind, psyche, will, and emotion etc. He was distinct from the Father while he continued to exist as the Father in heaven. As a genuine human being, Jesus was and is distinct from the Father. This is because of His humanity not because he is the second person of the Trinity. While I confess that the deity of the Son did pre-exist incarnation, I do not see that deity as the second person of the Trinity, known as " God the Son ", and separate from the Father or Holy Spirit, but rather as the uni-personal God of the old testament. Yahweh, the Father, the Great I Am.
Concerning the Holy Spirit, I believe He is the Spirit of God the Father and not a separate person of the Trinity, the third person known as " God the Holy Spirit. " The Holy Spirit is the Spirit of God, He is the Spirit of the Father, He is the Spirit of Christ. God is a Spirit, the Holy Spirit. There is one God not three, nor are there three persons that create one God. He is one uni-personal God that He himself became flesh. There is no such person as God the son nor God the Holy Spirit but only God the Father, the son of God and the Spirit of God.