“I never did anything by accident, nor did any of my inventions come by accident; they came by work.”
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I have not failed. I've just found 10,000 ways that won't work.
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Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.
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Just because something doesn't do what you planned it to do doesn't mean it's useless.
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I am proud of the fact that I never invented weapons to kill.
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