There must be no barriers to freedom of inquiry. There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors.

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.

My mother was born in Baltimore, and before her marriage, she was an artist and teacher of art.

My life as a child did not prepare me for the fact that the world is full of cruel and bitter things.