Jesus is called SON because He was flesh.
We are called SONS because we are flesh and accept God as our Father.
From John, the Beloved, own disciples and the Church Fathers:
God, then, having His own Word internal within His own bowels,
........... begat Him, emitting Him
........... along with His own wisdom before all things.
but the wisdom [Spirit in this instance is Sophia] of God which was in Him, and
........... His holy Word which was always present with Him.
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What this is literally saying, that the WORD and WISDOM (Spirit) are not separate on their own, because they come from within God Himself and remain as Him.
^
There is no God the SON!
There is God, His WORD, and God's Wisdom (Holy Spirit)!