If, however Adam and Eve had never been expelled from Eden, then the effort that is the basis for most human achievement, as well as both good and bad actions, would not exist. Without expulsion there would be no drive to restore the severed relationship with the Divine, no attempt to join ourselves once again with the God who created us…(Victor H. Matthews, Old Testament Turning Points: The Narratives that Shaped a Nation).
If humanity is truly created in the image of God, then there is an inherent element of free thinking that is an integral part of our mental makeup. Adam and Eve could not have remained as they were forever. If they were truly human, then the curiosity that stirred the ancients to discover uses for fire, stone, and animals demanded that they be awakened to their destiny, which was not in Eden. (pp. 32)