Thomas Edison — "There is no substitute for hard work."
There is no substitute for hard work.
There is no substitute for hard work.
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"I never did anything worth doing by accident, nor did any of my inventions come by accident; they came by work."
"We don't know a millionth of one percent about anything."
"I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that."
"To invent, you need a good imagination and a pile of junk."
"Many of life's failures are people who did not realize how close they were to success when they gave up."
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