If there was no sin nature in the Garden and they sinned, what is to keep sin from happening in the New Jerusalem? We will be immortal then, too, just like Adam and Eve originally were. What am I missing?
1 Cor. 15:24 tells us that in the end the Lord all destroy all dominion, authority, and power. Dominion means “that by which anything begins to be, the origin, the active cause.” Authority means “power of choice, liberty of doing as one pleases,” and power means “strength or ability”.
To me this means nothing that could tempt us to sin will be permitted in our new world, and even if it was we will not have the freedom of choosing to sin, nor will we have the strength or ability to do so. These things were all missing in the Creation.
The context of Paul’s statement is the end of the Millennium, when humans will enter eternity. But I believe the Church will have a 1,000 year head start on eternity, being made perfect in the rapture. Rev. 21:27 gives us a hint of this, saying, “Nothing impure will ever enter it (New Jerusalem), nor will anyone who does what is shameful or deceitful.”