It is not possible that the divine nature of the Son of God to physically exist before the world was. God is omnipresent. It is not possible for physical being to be omnipresent because physicality requires borders. Bodies with physical borders cannot be omnipresent and therefore cannot be God.
Also, to have a physical body infers visibility. Since God is invisible, it is not possible for the divine nature of the Son of God to be seen as inferred by having a physical body.
All physical bodies are created as physical bodies require space and space and time were created by God. All created things have a beginning and since God the Son is eternal, it is not possible that God the Son physical body is eternal.
"and the word (Son of God's divine nature) became flesh" .....The action of "becoming" contradicts the immutability of the divine nature of God.
THE SECOND HELVETIC CONFESSION
A RATIONAL SOUL IN CHRIST. Moreover, our Lord Jesus Christ did not have a soul bereft of sense and reason, nor flesh without a soul, but a soul with its reason, and flesh with its senses, by which in the time of his passion he sustained real bodily pain, as himself testified when he said: "My soul is very sorrowful, even to death" (
Matthew 26:38). And, "Now is my soul troubled" (John 12:27).
TWO NATURES IN CHRIST. We therefore acknowledge two natures or substances, the divine and the human, in one and the same Jesus Christ our Lord (Hebrews 2). And we say that these are bound and united with one another in such a way that they are not absorbed, or confused, or mixed, but are united or joined together in one person the properties of the natures being unimpaired and permanent.
NOT TWO BUT ONE CHRIST. Thus we worship not two but one Christ the Lord. We repeat: one true God and man. With respect to his divine nature he is consubstantial with the Father, and with respect to the human nature he is consubstantial with us men, and like us in all things, sin excepted (
Hebrews 4:15).
THE DIVINE NATURE OF CHRIST IS NOT PASSIBLE, AND THE HUMAN NATURE IS NOT EVERYWHERE. Therefore, we do not in any way teach that the divine nature in Christ has suffered or that Christ according to his human nature is still in this world and thus is everywhere. For neither do we think or teach that the body of Christ ceased to be a true body after his glorification, or was deified, and deified in such a way that it laid aside its properties as regards body and soul, and changed entirely into a divine nature and began to be merely one substance.