Robert A. Heinlein Quotes about Sleep

Happiness consists in getting enough sleep. Just that, nothing more.
Robert A. Heinlein (1987). “Starship Troopers”, p.46, Penguin
Robert A. Heinlein (1987). “Starship Troopers”, p.39, Penguin
Robert A. Heinlein (1959). “The Door Into Summer”, Roc