43. The Lord gave clear evidence of His supreme power in what He endured from hostile forces when He endowed human nature with an incorruptible form of generation. For through His passion He conferred dispassion, through suffering repose, and through death eternal life. By His privations in the flesh He re-established and renewed the human state, and by His own incarnation He bestowed on human nature the supranatural grace of deification.
It is no longer the nature of man to die.
I think we sometimes lose sight of that truth as Christians today. We are no longer slaves to death. Moreover, we can now become like God. We can become one with God. Before the Incarnation, that was forever beyond our reach. God was wholly other from us. While we could not know or commune with God, the Word could and did become one of us. That’s why the best short description of salvation is union with Christ. As we are one with Christ, so we become one with God and with each other.