Amos wrote "Spark" after suffering a miscarriage. She discussed the song in an article from Q magazine in May 1998. “Y'know, once you've felt life in your body, you can't go back to having been a woman that's never carried life. The other thing is feeling something dying inside you and you're still alive. Obviously when it was happening, it was already over, but in my mind, you don't know that it's over yet. You're doing anything, thinking, 'Oh God, maybe if I put a cork up myself, maybe it'll keep this little life in. Read more on Last.fm.