A secret's only a secret as long as you keep it. Once you tell someone it loses all its power -- for good or ill -- like that, it's just another piece of information. But a real mystery can't be solved, not completely. It's always just out of reach, like a light around the corner; you might catch a glimpse of what it reveals, feel its warmth, but you can't know the heart of it, not really. That's what gives it value: It can't be cracked, it's bigger than you and me, bigger than everything we know.