En huioi means “in son” or “in the son”. He is the one through whom the worlds were made.
“Through whom also He made the worlds” –
Hebrews 1:2 “Through” is “
dia”, meaning, “by means of”.
John 1:1-3;14 “In the beginning was the Word, and the Word was with God, and the
Word was God. The same was in the beginning with God. All things were made by him; and without him was not anything made that was made. And the
Word was made flesh, and dwelt among us,”
The Word is not separate from God, therefore, Jesus is not separate from God.
Conclusion: God became his own son. Or rather, God became a son - "(and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth..."
John 1:14
And if
Isaiah 42:8 says, "I am the Lord; that is my name; and my
glory will I not give to another.....", it is NOT possible that God is NOT the son if we can behold that "
glory" in Jesus Christ.