"Ignorance is never better than knowledge."

"I consider myself a lucky man who did not have to choose between going to war and doing something else. I just did what I was doing."

"I hope it won't take long."

"It is not possible that such a small difference in the atomic weights of hydrogen and helium could have such tremendous consequences."

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