Ok since the song was written before Twlight, this is my interpretation of what this song means. At first he's talking about how he was broken and in a bad place in he's life. Then met this woman, whose persona was a natural beauty (awe). She saved him and brought him life again but his fighting the feeling (hints: "let me sign, let me sign, can't fight the devil so let me sign" I thinks is more of a physical sign, rather then like signing a contract). Second part he's realized that he's fallen for her "lay me down easy let me understand" is he's way of inviting her in to he's world but he wants to know her intensions. The last part well I think is simple he's describing an intimate night they shared. All "twisted in black" is talking about her in bed covered in black sheets and "on the way down, never coming back" is talking about how he doesn't want to ever leave her or that moment. Well whatever your interpretation is the song is very deep.