"I think the only person a writer has an obligation to is himself. If what I write doesn't fulfill something in me, if I don't honestly feel it's the best I can do, then I'm miserable."

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In mathematics, if a pattern occurs, we can go on to ask, Why does it occur? What does it signify? And we can find answers to these questions. In fact, for every pattern that appears, a mathematician feels he ought to know why it appears.

— W. W. Sawyer