User blog comment:SliverV1/Riddles/@comment-1874176-20110914172829/@comment-1874176-20110914173654

Yup; Song is about the devil wanting to take a young man, and the young man gives the devil this riddle, betting that he can't solve it.

Eventually, the devil gives up, and the last lines of the song are:

Its something the devil doesn't know.

Something that is called "love",