The Father’s salvational blueprint has two-phases which kinda like constructing a building that has two-phases.
1st Phase- Structural stage
2nd phase- Architectural stage
1st Phase: The Image of God or the Son was the first in time who was created, He serves as the cornerstone of the Creation (Col 1:16). At that point, the Son has no human flesh yet. He inherited a name that is superior to all, (Heb 1:4) above all names (Philippians 2:9-10) that is the Name of His Creator but was not revealed to humans until the time when He was sent to be one of them.
“He is the image of the invisible God, the firstborn over all creation. For by Him all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or principalities or powers. All things were created through Him and for Him.”Colossians 1:15-16 NKJV
2nd Phase: Corner Stone of Salvation (John 3:17). Coming in the flesh, this is the realization of the Son as the Christ. This is when the Name of the Father was revealed to humans through the Son as Christ (John 17:6). Christ admitted in John 17:11 (20 Supporting Versions) that the name of the Father was given to Him. In Matt 1:21 the Son was given the name JESUS. It was prophesied in Isaiah 9:6 that the name given will be called Everlasting Father as this was actually the name of His Father.
“Behold, the virgin shall be with child, and bear a Son, and they shall call His name Immanuel,” which is translated, “God with us.”Matthew 1:23 NKJV
In both phases, the Father was in Him because Father is the Eternal Life (John 17:3), part but in exact essence was in the Son, without the Father in the Son, He can do nothing and because the Father is in Him, whatever the Son does, the Father does also. (John 5:19).