47. Sin first enticed Adam and tricked him into breaking the commandment; and by giving substance to sensual pleasure and by attaching itself through such pleasure to the very root of nature, it brought the sentence of death on all nature, since through man it impels all created things towards death. All this was contrived by the devil, that spawn of sin and father of iniquity who through pride expelled himself from divine glory, and through envy of us and of God expelled Adam from paradise (cf. Wisd. 2:24), in order to destroy the works of God and dissolve what had been brought into existence.
Man was not created perfect and immortal. I often hear descriptions of creation in my Christian circles that sound like the point of the Incarnation was to restore man to a former condition. You find little sense of that anywhere in the first millenium of Christian faith and practice. Rather, the consistent sense is that man was created immature, almost like a child, with potential toward God and life or destruction and death and the freedom to grow. But in the creation narrative, humanity never really does anything but sin.
It’s not that we were immortal and God punished us with death for violating his rules. Who would want to worship a God like that? The goals of the devil and all he represents are destruction and annihilation. When we turned from our only source of life — something the story tells us we did immediately — we should have ceased to exist. God, who begrudges existence to none of his creation, extended the period of our physical death and preserved some remnant of our being in that shadowy half-existence the ancient Hebrews called Sheol.
I think a lot of people misunderstand the problem and thus perceive God and the work of Jesus in a strange light.