Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.

Not only will atomic power be released, but someday we will harness the rise and fall of the tides and imprison the rays of the sun.

Genius is one percent inspiration and ninety-nine percent perspiration. As a result, a genius is often a talented person who has simply done all of his homework.

I start where the last man left off. What the mind of man can conceive and believe, the mind of a man can achieve.

Everyone steals in commerce and industry. I've stolen a lot, myself. But I know how to steal! They don't know how to steal!

Do the thing and the power will come.

There is far more opportunity than there is ability.