There must be no barriers for 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.

To try to be happy is to try to build a machine with no other specification than that it shall run noiselessly.

It is proper to the role of the scientist that he not merely find new truth and communicate it to his fellows, but that he teach, that he try to bring the most honest and intelligible account of new knowledge to all who will try to learn.

Taken as a story of human achievement, and human blindness, the discoveries in the sciences are among the great epics.

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.

Science is not everything, but science is very beautiful.

We hunger for nobility: the rare words and acts that harmonize simplicity and truth.