I never did anything worth doing by accident, nor did any of my inventions come indirectly through accident, except the phonograph. No, when I have, fully decided that a result is worth getting, I go about it, and make trial after trial, until it comes.

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Quote text and notes from Wikiquote: Thomas Edison (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.