When I have fully decided that a result is worth getting I go ahead of it and make trial after trial until it comes.

Fools call wise men fools. A wise man never calls any man a fool.

We shall have no better conditions in the future if we are satisfied with all those which we have at present.

Genius is 1 percent inspiration, 99 percent perspiration.

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

There will one day spring from the brain of science a machine or force so fearful in its potentialities, so absolutely terrifying, that even man, the fighter, who will dare torture and death in order to inflict torture and death, will be appalled, and so abandon war forever.

Invention is 10% inspiration and 90% perspiration.