"The atomic bomb is a weapon that has no limit to its destructive power. It is a weapon that can destroy cities, and it is a weapon that can destroy nations."

"The things that make a man human are also the things that make him dangerous."

"There are children playing in the street who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago."

"It is not possible to be a scientist unless you believe that it is good to learn. It is not possible to be a scientist unless you believe that it is of the highest value to learn."

"Both the man of science and the man of action live always at the edge of mystery, surrounded by it."