gravity

You know how sometimes you lie in bed at night and think, “What if the law of gravity just wears out and lets go and I drift into space?” Does that ever make you anxious?

Elaine May, “Allen, Coen and May: 3 Wits, One Show” (2011)

insomnia

If you can’t sleep…get up and work or read until you do feel sleepy. Remember that no one was ever killed by lack of sleep. Worrying about insomnia usually causes far more damage than sleeplessness.

Dale Carnegie, How to Stop Worrying and Start Living (1948)

Note: This quote is widely misquoted as: “If you can’t sleep, then get up and do something instead of lying there and worrying. It’s the worry that gets you, not the loss of sleep.”