"Confide not in the firmness of your principles, or the steadfastness of your integrity. Be always vigilant and fearful. Never think you have enough of knowledge, and let not your caution slumber for a moment, for you know not when danger is near."

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Until I became a published writer, I remained completely ignorant of books on how to write and courses on the subject ... they would have spoiled my natural style; made me observe caution; would have hedged me with rules.

— Isaac Asimov