"Turning off the engine - that, finally, is what sleep is. In a human being, sleep
provides rest for both the flesh and the spirit. When a person lies down and rests
her muscles, she simultaneously closes her eyes and cuts off the thought process.
And excess thoughts release an electrical discharge in the form of dreams."
Haruki Murakami, "Sleep", short story in The Elephant Vanishes,
NY: Vintage International, 1994, page 98.