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

I have not failed. I have successfully discovered 1200 ideas that don't work.

The beauty of a great idea lies in the art of using it.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-ness.

For faith, as well intentioned as it may be, must be built on facts, not fiction - faith in fiction is a damnable false hope.

Time is really the only capital that any human being has, and the only thing he can't afford to lose.

The real measure of success is the number of experiments that can be crowded into 24 hours.