" I remember, back in college, how many possibilities life seemed to hold. Variations. I knew, of course, that I'd only live one of my fantasy lives, but for a few years there, I had them all, all the branches, all the variations. One day I could dream of being a novelist, one day I would be a journalist covering Washington, the next - oh, I don't know, a politician, a teacher, whatever. My dream lives. Full of dream wealth and dream women. All the things I was going to do, all the places I was going to live. They were mutually exclusive, of course, but since I didn't have any of them, in a sense I had them all. Like when you sit down at a chessboard to begin a game, and you don't know what the opening will be. Maybe it will be a Sicilian, or a French, or a Ruy Lopez. They all coexist, all the variations, until you start making the moves. You always dream of winning, no matter what line you choose, but the variations are still … different." … "Once the game begins, the possibilities narrow and narrow and narrow, the other variations fade, and you're left with what you've got - a position half of your own making, and half chance, as embodied by that stranger across the board. Maybe you've got a good game, or maybe you're in trouble, but in any case there's just that one position to work from. The might-have-beens are gone."

(Unsound Variations) "

― George R.R. Martin , Dreamsongs, Volume II