"I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that."

"There is no substitute for hard work."

"So far as the religion of the day is concerned, it is a damned fake … Religion is all bunk."

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

"I am not a spiritualist. I am not a medium. I am a scientist. I am trying to build a machine to communicate with the dead. I am trying to prove that there is life after death. I am trying to prove tha…"