"Over-seriousness is a warning sign for mediocrity and bureaucratic thinking. People who are seriously committed to mastery and high performance are secure enough to lighten up."

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Crazy people who are productive are geniuses. Crazy people who are rich are eccentric. Crazy people who are neither productive nor rich are just plain crazy. Geniuses and crazy people are both out in the middle of a deep ocean; geniuses swim, crazy people drown. Most of us are sitting safely on the shore. Take a chance and get your feet wet.

— Michael J. Gelb