"I have a theory that the human voice is immortal. It is a form of energy that never dies. It just changes form."

"Opportunity is missed by most people because it is dressed in overalls and looks like work."

"My success is due to the fact that I never went to school and was never forced to learn anything but what I wanted to know."

"I don't care how many inventions I make. I want to make one that will benefit humanity."

"I am an old man, but I am still learning."