“Ah, clever clogs, but it will have happened in one of my alternative lives. You know--the lives hot-shot scientists tell us we are living at the same time as this one we know about. Which being so, how do you know that what happens in one of your alternative lives doesn't sometimes leak through into your consciousness in this life, and make you sad that you aren't living that particular alternative life instead of this one? Don't you sometimes feel depressed for no reason you can think of? I do. And maybe that's why. We've had a leak from an alternative life and want that life now. Like wanting an ice cream when you were little, which you knew was in the freezer, but your mom wouldn't let you have it.”