And you probably also know that when you look out of an aeroplane window and see the world shrink like that, you can't help but think about the whole of your life, from the beginning until where you are now, and everyone you've ever known. And you'll know that thinking about those things makes you feel grateful to God for providing them, and angry with Him for not helping you to understand them better, and so you end up in a terrible muddle and needing to talk to a priest. I decided I wouldn't sit in the window seat on the way back. I don't know how these jet-set people who have to fly once or twice a year cope, I really don't.