"I owe my success to the fact that I never had a clock in my workroom. Seventy-five of us worked twenty hours every day and slept only four hours — and thrived on it."

"I never did a day's work in my life. It was all fun."

"I am more of a sponge than a scientist."

"I could always invent something for which there was a demand."

"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."