“Through death You transformed what is mortal, and through burial You transformed what is corruptible; for in a manner befitting God You made incorrupt and immortal the nature which You had assumed, since Your flesh did not see corruption and in a wondrous manner Your soul was not abandoned in hell.” (Pascha Nocturnes)
In the incarnation, God the Son, took on sinful, fallen human flesh. He transfigures that flesh – transforming what was mortal and corruptible, making even the flesh incorruptible and immortal.
According to Genesis 2 when God created humans, God formed the dust of the earth into a body and then breathed life into that dust. In the resurrection, God is no longer outside of creation, but has become creation, and from within renews human nature. God in Christ takes on our fallen human nature, suffers death, and then transforms and transfigures the human nature and the human body which He has taken on in the incarnation. No longer from the outside does God shape us and give us life, but now from within God transforms His creation. Not from heaven, but from Hades does God transform us and give us eternal life depriving Hades of holding on to us, and restoring mortal human nature to life – ending humanity’s separation from God.
Christ as God enters into the place of the dead and saves not just souls, but the entirety of what it is to be human including our bodies.