The biggest failure of man is that he gives up before he realizes how close he was to success.

Be courageous! Have faith! Go forward.

Until man duplicates a blade of grass, nature can laugh at his so called scientific knowledge.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

Discontent is the first necessity of progress.

When there's no experimenting there's no progress. Stop experimenting and you go backward. If anything goes wrong, experiment until you get to the very bottom of the trouble.

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.