Thomas A. Edison

Genius is one percent inspiration and ninety-nine percent perspiration.

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.

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

Great ideas originate in the muscles.

Just because something doesn't do what you planned it to do doesn't mean it's useless.