I believe this about Gods Son for in Him all the fullness dwells. He and the Father are one and He is all that the Father is. In this He is the first and last but He is a begotten Son of the Father.
He is the radiance of the glory of God and the exact imprint of his nature - I agree, I disagree in how this is so.
Begotten of the Father alone before all ages but not made. I agree in part.
He is a Son. He has received from His Father. The glory of oneness, the fullness, sovereign authority and appointed heir of all things by God.
The Father has not received from any other being.
If Jesus always was and always was God how then did He become a Son who has a God?
Paul, the reason you keep getting stuck is that you are treating “Son” as if it were a creaturely category. In Scripture, it is not. The Son is not “made a Son”—He is eternally the Son.
Let me answer your question directly, you asked:
“If Jesus always was and always was God, how then did He become a Son who has a God?”
He did not “become” the Son. He is the Son from all eternity.
His sonship is not a created role but an eternal relationship within the Godhead.
1. Eternal Sonship: the Son is eternally from the Father, not created by the Father.
He is “begotten, not made” (John 1:1, 1:14, 1:18).
When Christians confess the Son as “begotten, not made,” the phrase is often misunderstood. In biblical and Nicene usage,
“begotten” does not mean created or brought into existence. A faithful rendering today would be:
“the Son is eternally from the Father, not created.”
“Begotten” speaks of an
eternal relationship that originates within the Godhead:
the Father is unbegotten,
the Son is eternally from the Father,
the Spirit eternally proceeds.
This is not biological language and does not imply beginning. It means the Son is
of the same divine essence as the Father, truly God of God, not a creature elevated to divine status.
Eternal generation means:
He receives His divine personhood from the Father, but not His divine essence (which is one and undivided).
He is fully God because the divine essence is not partitioned or transmitted like substance — it is one, eternally possessed by Father, Son, and Spirit.
2. The Son “having a God” refers to His true humanity, not His eternal deity.
When the Son took on flesh, He also took on a human relationship to God as His God.
Scripture is explicit:
“The Word became flesh.” (John 1:14)
“Born of woman, born under the law.” (Gal 4:4)
As God, the Son has no superior.
As man, the Son perfectly obeys, worships, and depends on the Father.
This is why the resurrected Jesus says:
“I ascend to My Father and your Father, to My God and your God.” (John 20:17)
Not because He is a creature,
but because He became truly human for our salvation.
If the Son had not taken a real human nature, He could not be our Redeemer.
3. Everything the Son “receives” in Scripture He receives as the incarnate Messiah, not as a created being.
You listed:
glory
fullness
sovereign authority
heirship
kingship
All of these are His by eternal right as God (John 5:21–23; Heb 1:3),
but they are given to Him in time as the Mediator, the second Adam (Phil 2:9–11).
This is why the Bible speaks in two ways:
As God:
“Your throne, O God, is forever and ever.” (Heb 1:8)
As man:
“The Father is greater than I.” (John 14:28)
Two natures, one Person.
Not two beings. Not a created son.
4. Why did the eternal Son take on flesh and speak of God as His God?
Exactly because He came to redeem a people for the Father’s glory.
He condescended.
He took on our nature.
He entered our condition.
He placed Himself under the law.
He obeyed where we failed.
He died the death we deserved.
He rose in the humanity He assumed.
He leads many sons to glory (Heb 2:10).
You asked,
“How can He have a God if He is God?”
Answer:
Because the eternal Son became man for our salvation.
He has a God according to His humanity — not according to His deity.
If He had not become man, He could not be our Mediator.
If He were merely a creature, He could not be our Savior.
The Son is Son eternally in His deity, and Son in time according to His humanity.
One Person, two natures—true God and true man for us and for our salvation.