I never did a day's work in my life. It was all fun.
We don't know a millionth of one percent about anything.
The value of an idea lies in the using of it.
Discontent is the first necessity of progress.
I have friends in overalls whose friendship I would not swap for the favor of the kings of the world.
I never did anything by accident, nor did any of my inventions come by accident; they came by work.
To have a great idea, have a lot of them.
The best thinking has been done in solitude. The worst has been done in turmoil.
Religion is all bunk.
Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.
Your worth consists in what you are and not in what you have.
Great ideas originate in the muscles.
Maturity is often more absurd than youth and very frequently is most unjust to youth.
The body is a community made up of its innumerable cells or inhabitants.
What a man's mind can create, man's character can control.
Be courageous. I have seen many depressions in business. Always America has emerged from these stronger and more prosperous. Be brave as your fathers before you. Have faith! Go forward!
Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.
When I have fully decided that a result is worth getting I go ahead of it and make trial after trial until it comes.
I am proud of the fact that I never invented weapons to kill.
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.
