"I have a theory that the human voice is immortal. It is a form of energy that never dies. It just changes form. I believe that we can record the voices of the dead and play them back."

"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 think there is any such thing as an immortal soul. I think that the soul is just a function of the brain, and when the brain dies, the soul dies. I think that the soul is just a collection of …"

"I am long on ideas, but short on time. I expect to live to be only about a hundred."

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