They say President Wilson has blundered. Perhaps he has, but I notice he usually blunders forward.

Success is the product of the severest kind of mental and physical application.

I never perfected an invention that I did not think about in terms of the service it might give others... I find out what the world needs, then I proceed to invent.

The chief function of the body is to carry the brain around.

There is far more opportunity than there is ability.

Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.

I find out what the world needs. Then I go ahead and try to invent it