His genius he was quite content in one brief sentence to define; Of inspiration one percent, of perspiration, ninety nine.

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

I start where the last man left off.

The doctor of the future will give no medication, but will interest his patients in the care of the human frame, diet and in the cause and prevention of disease. ~

Whatever the mind of man creates, should be controlled by man's character.

The secret of success is focus of purpose.

I am proud of the fact that I never invented weapons to kill.