It's called a question; and can be readily deduced from interpreting the scripture about the fullness of the godhead as you just did; that is that Jesus was the literal utter eternal fullness of GOD ALMIGHTY as He walked the earth prior to resurrection.
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The Son is God.
The Father is God.
The Holy Spirit is God.
BUT
The Son is not the Father.
The Father is not the Son.
The Son is not the Holy Spirit.
The Holy Spirit is not the Son.
The Father is not the Holy Spirit.
The Holy Spirit is not the Father.
YET
The three Persons are one God.
You keep assuming (like GT) that when we say "God" we always mean "the Father." And that's not true.
When we say "God," we mean God the Father, Son, and Holy Spirit, all three Persons as one Being.
BUT
When we say "the Son," we mean the Son, who is God.
When we say "the Father," we mean the Father, who is God.
When we say "the Holy Spirit," we mean the Holy Spirit, who is God..