“If they ask you to stand still, you should dance.”

He was speaking, communicating, and yet not breaking the spell. I then broke it. Quite deliberately. "How can it be luck if I aim?" I said back to him, not loud (despite the italics) but with rather more irritation in my voice than I was actually feeling. He didn't say anything for a moment but simply stood balanced on the curb, looking at me, I knew imperfectly, with love. "Because it will be," he said. "You'll be glad if you hit his marble — Ira's marble — won't you? Won't you be glad? And if you're glad when you hit somebody's marble, then you sort of secretly didn't expect too much to do it. So there'd have to be some luck in it, there'd have to be slightly quite a lot of accident in it."
Raise High the Roof Beam, Carpenters and Seymour: An Introduction (1963), Seymour: An Introduction (1959)

Arrow of God (1988)

Source: You Don't Know Me

Source: World Without End

Variant: One must still have chaos in oneself to be able to give birth to a dancing star.
Source: Thus Spoke Zarathustra

Source: Factfulness: Ten Reasons We're Wrong About the World and Why Things Are Better Than You Think

Armstrong's response to the question what jazz is, cited by Max Jones et. al.: "Salute to Satchmo", I.P.C. Specialist & Professional Press Ltd 1970, page 25
Often misquoted as "Man, if you gotta ask you'll never know." Oxford Dictionary of Modern Quotations (third edition)

Source: Alone on a Wide Wide Sea

Source: Mockingjay