I have heard alot of bogus information about how our flesh is that of Satan. In the Bible our bodies were GIVEN to us by GOD, who makes NO mistakes. That was in the Old Testement. Jesus in the New Testement said that our body is the TEMPLE of GOD. SATAN was defeated by Jesus. How can our BODy be made GOOD by GOD and be the TEMPLE of said and be that of SATAN too?
I did a lot of reading on Puritans... they favored the mind over the body and thought that any natural emotions - like desire - were evil and our purpose as Christians was to eradicate those urgings - they were "things of the flesh" not "things of the spirit"
I think also we tie the idea of impermanence to our fleshy bodies - since our spirits should be transcendent from them.
Anyway, since most protestant religions are descended from their puritanical ancestors, they tend to hold to that idea of mind and spirit being higher and more holy than our impermanent, imperfect flesh.
When did the Earth stay dark? Never!!! God and Jesus defeated Satan many times so that doesn't make any of us Dark and we don't need to be Born Again, because as the bible says and Jesus told us-he is already there in our hearts and minds. I am sorry that you and others cannot read that Bible and get the GOOD things out of it. Why must you dwell with the bad side of things?