"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."

"We have made a thing, a most terrible weapon, that has altered the nature of the world. We have made a thing that has made it impossible for us to live without changing our whole way of life."

"The atomic age has changed everything, save our modes of thinking, and thus we drift toward unparalleled catastrophe."

"The world is not a collection of facts, but a collection of relationships."

"In the spring of 1936, I was introduced by friends to Jean Tatlock. In the autumn, I began to court her. We were at least twice close enough to marriage to think of ourselves as engaged."