"I carry a great burden of responsibility."

"I am a physicist. I am not a philosopher. I am not a theologian. I am a physicist. And I have done my job."

"The physicists have known sin; and this is a knowledge which they cannot lose."

"The most important thing in life is to learn how to give out love, and to let it come in."

"We have to find a way to use this power for good, not for evil."