"The main point is to be honest with yourself, and to admit when you are wrong."

"The world has been changed, for good or ill."

"The history of science is full of examples of people who thought they knew everything, and then discovered that they knew very little."

"The atomic age will either usher in a new era of prosperity, or it will be the end of civilization."

"When we were working on the atomic bomb, we knew that we were doing something that would change the world forever."