The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.
Thomas A. Edison

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Other quotes by Thomas A. Edison

Hell, there are no rules here - we're trying to accomplish something.

They say President Wilson has blundered. Perhaps he has, but I notice he usually blunders forward.

Results! Why, man, I have gotten a lot of results. I know several thousand things that won't work.

Everything comes to him who hustles while he waits.

I find my greatest pleasure, and so my reward, in the work that precedes what the world calls success.