Adam and Eve were thrown out of the Garden of Eden because they angered the Lord.
Jehovah blocked the entrance to the Garden of Eden with Angels and a flaming sword.
When it came to trusting somebody, they chose the wrong one to trust.
They chose to trust Satan so they eventually died and returned to dust.
After being exiled, neither they or their offspring could return.
That teaches people a valuable lesson that we must learn.
We must trust and obey Jehovah instead of Satan or we will not receive our reward.
If we put our faith in God, our paradise won't be blocked by Angels or a flaming sword.