"I mean, I can't say that I've had many deep thoughts because I traveled alone, but it's good to be with myself in the quiet."

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When you realize that no one really knows what they are doing and that everyone is doing the best they can according to their own level of consciousness, life gets a lot easier. Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.

— Carl Sagan