"We have used a weapon that has changed the course of history."

"If atomic bombs are to be added as new weapons to the arsenals of a warring world, or to the arsenals of nations preparing for war, then the time will come when mankind will curse the names of Los Ala…"

"It is perfectly obvious that the whole world is going to hell. The only possible chance that it might not is that we do not attempt to prevent it from doing so."

"The physicists have known sin; and this is a knowledge which they cannot lose. It is a knowledge which has changed them forever."

"I had had a continuing smoldering fury about the treatment of Jews in Germany."