New Delhi, July 20 -- If you want to write a song about the heart/ Think about the moon before you start," Paul Simon advised in Song About The Moon. It's not just the heart, though-the malleability of the moon as a symbol allows its use in an impressively wide range of songs. Musicians working in everything from country to ska to post-rock have linked the moon to loneliness, romance, madness, vampires, werewolves. It's a quiet observer in Elvis Presley's ethereal Sun Studio recording of Blue Moon ("You saw me standing alone"), a confidant in Sting's Sister Moon ("I'd go out of my mind, but for you"). It's a bad combination with all the rum Chuck Berry is drinking in Havana Moon. It can be a portent of bad times (Bad Moon Rising) or a marker of good times (Dancing In The Moonlight)....