The question sounds mythological, because it does not distinguish between the fact that Jesus Christ was a man on earth and was a spirit being in his prehuman existence. The Bible never teaches that the Man Jesus had a double nature, human and spirit divine. However, before Jesus was born “of a woman” (Galatians 4:4), He was the spirit being call the “Logos,” (translated “Word”).
As the Word, He needed to become “the son of man” (Adam) to be a “ransom” for mankind. How did Jesus pay a ransom? When someone is held captive, a ransom price is asked for his release. The ransom price to release Adam (and his children) from the grave was the Man Jesus. A perfect human life (Jesus) for a perfect human life (Adam). (See 1 Corinthians 15:22). No more and no less would be acceptable. Therefore, Jesus must have had the same nature as sinner Adam, because He replaced Adam in the grave of death. The change of nature was necessary for absolute justice to be satisfied. Consequently, “the Word was made flesh” (John 1:14).
In Philippians 2:7-8 (ESV), Paul states the Logos “…emptied himself, by taking the form of a servant, being born in the likeness of men. And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross.” Our Lord deprived himself of the glory and dignity as the Logos. As a perfect man, He obeyed God’s will until the death of the cross. Jesus was not a combination of two, human and spiritual. The combination of two natures creates neither one nor the other, but a hybrid, an imperfect creature, which is an abomination in the concept of divine arrangement.
2 Corinthians 8:9, “…the grace of our Lord Jesus Christ, that though He was rich, yet for your sakes He became poor, that you through His poverty might become rich.” He did not pretend to be poor, he did not play the role of the poor or someone who for some time took a lower body. He was the man Jesus Christ. He left the glory he had with the Father before the world came into being. He abandoned it all, abandoned the state on the spirit level, and actually became a human to become a suitable price for the man who sinned – Adam.
1 Timothy 2:5,6: “For there is one God and one Mediator between God and men, the Man Christ Jesus, who gave Himself a ransom for all…”