Somnus lets her poppies fall most plentifully on those having a cool head, an empty stomach, tired muscles, a quiet conscience, and warm feet. – Author unknown, quoted by Rachel Brooks Gleason, “Sleep,” 1867

[S]leep, and enough of it, is the prime necessity. Enough exercise, and good food and enough, are other necessities. But sleep—good sleep, and enough of it—this is a necessity without which you cannot have the exercise of use, nor the food. – Edward Everett Hale, “How to Get the Best of It,” c.1892

Without enough sleep, we all become tall two-year-olds. – JoJo Jensen, Dirt Farmer Wisdom, 2002