After plucking the forbidden fruit from the tree of the knowledge of good and evil, people long to return to a pure state without sin. But they cannot pluck the fruit from the tree of life by themselves. Any attempt to get by on your own without trust in God ends tragically. Adam and Eve were expelled from Paradise. But God does not abandon them.
I have created an Animated video that shows this situation. And it is an introduction to the film prepared by Bible Unbound, in which the author, analyzing this situation, finds an analogy in the History of David, his defeats after his victories.