loved the finale! i believe Jacob and his "friend" on the beach represents good vs. evil...Jacob is the good and the other one is the evil..on the beach they talk about how jacob is still trying to prove the other guy wrong, that people can live in peace and not that "they come fight they, destroy, they corrupt." The other guy states how much he wants to kill Jacob, but both men are immortal and immortals cannot kill each other, so the other guy tries to find a loophole in order to kill Jacob. So since Locke died, he took over his body and he was the perfect candidate to do this since he just became the leader of the "others" before he died. Zombie Locke then tells and convinces Ben (a mortal) to kill Jacob. Jacob also represents God in a way because everyone on the island looks up to him and takes orders from him even though theyve never met him or knows what he looks like. Cannot wait til the final season!!