One of the many interpretations of the meanig of Genesis and Adam and Eve is that God actually set up. You see, until you know right from wrong, you are not responsible. Just like children, they do not understand what 'HOT', and 'you will get burnt', until they indeed get burnt.
Look at what would happen (metaphysically of course), if man did not eat from the tree of knowledge of good and evil. Mankind would still be just the same as the beasts. According to one of the Jewish interpretations, God set man up, so man could learn the difference between right and wrong,and therefore be able to choose to live right, and therefore CHOOSE to be closer to God.