"There must be no barriers for freedom of inquiry... There is no place for dogma in science."

"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."

"We are not to be saved by technology, we are to be saved by humanity."

"I believe that in the long run, the only way we can survive is to make the world safe for peace."

"I need physics more than friends."