"You think you know the world you are living in if you can feel it, and touch it, and smell it, and taste it, then it must be so. You tell youself that you would bet your life on the simple fact that the sky is blue. And then one day someone comes along and informs you emphatically that you're wrong. Blue, you insist. Blue as the ocean. Blue as a whale. Blue as my daughter's eyes. But that person shake his head, and everyone else backs him up. You poor girl, they say. All of those things - the ocean, the whale, her eyes - they're green. You've gotten them mixed up. You've had it wrong all along."