Good and Evil are human concepts. I believe in God, an ultimate power, but if we think it is good or evil depends entirely on our own point of view, as with all things. As for the devil I belive a lot of people take it to literally. The devil is mealy a metaphor for temptation, the voice we all hear when we try to follow a certain path wether it be a life according to the bible or simply giving up smoking, we all have our demons.