A Careful Man Dies – Ray Bradbury

You sleep only four hours a night. You go to bed at eleven and get up at three and everything is clear as crystal. You begin your day then, have your coffee, read a book for an hour, listen to the faint, far, unreal talk and music of the predawn stations and perhaps go out for a walk, always being certain to have your special police permit with you. You have been picked up before for late and unusual hours and it got to be a nuisance, so you finally got yourself a special permit. Now you can walk and whistle where you wish, hands in your pockets, heels striking the pavement in a slow, easy tempo. This has been going on since you were sixteen years old. You’re now twenty-five, and four hours a night is still enough sleep.