"As I thought about endings and - being a lover of fairy tales - I knew immediately that the deeply rooted last line in folk stories, 'And they lived happily ever after', is the core of what we think we know about endings. We hear it always in our hindbrain because it's the last line most of us in the West have grown up with. That line stops the story at the point of greatest happiness. The wedding, the homecoming, the mystery unraveled, the villain disposed of, families reunited, babies born. If we went on in the story Cinderella, she might be whispered about in court: after all, her manners are not impeccable, she always has smudges of ash on her nose, and no one can trace her bloodline back enough generations. Perhaps she has grown fat eating all that rich food in the castle, and the prince's eye has strayed.