As with much of the Bible, this is one great story.
Here you've got Adam and Eve, wandering around naked, happy as pigs in mud. Then there's this tree that they're not supposed to mess with. And what is it called? The Tree of the Knowledge of Good and Evil.
Could it be any more simple? You're a stupid animal. You feel no guilt. You eat, multiply and die. No one cares. No remorse; just being. (See Zen.)
But you notice this tree that you hadn't seen before. There's pretty things there that looks good to eat. And in one fell swoop (as in the scene from 2001 when the monkey throws the bone into the air in a mixed emotion of superiority and terror) you have become what we call
Man.