I agree with roguernot that I really don't think the song is about Twilight. The song does fit the storyline of it, but I think it's just a general song about fighting attractions to something that you shouldn't want. For example, I think of maybe a popular girl, who cares about her reputation, growing a crush on geeky nerd, or maybe a married person showing interest in someone other than their spouse. Also, roguernot's belief on how it's about temptations of Satan is so very perceptive and I never thought of it like that when I listened, until it was mentioned :)