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

Be courageous. I have seen many depressions in business. Always America has emerged from these stronger and more prosperous. Be brave as your fathers before you. Have faith! Go forward!

Your worth consists in what you are and not in what you have.

The value of an idea lies in the using of it.

I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.

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