"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."

"I am not a vegetarian. I eat meat, but I don't eat much meat. I eat very little meat."

"It is not because things are difficult that we do not dare; it is because we do not dare that they are difficult."

"We don't know a millionth of one percent about anything."

"There is no substitute for hard work."