after the movie (Angels n Demons), it hits me that Rules were the focus religions tried to enforce. though often implied through the traditional way, the concept remains unaltered. personally, it has always been Morality - what should n should not be done. though one's intention doesn't always have to start at an evil point, but being an imperfect being as we are, one way or the other, sidetracking became transparent.
on the contrary, humans are not humans if not prone to sin (which leads to some of us redirecting that energy towards god n faith).