Does the commandment 'Thou Shalt Not Kill' mean nothing to us? Are we to interpret it as meaning 'Thou shalt not kill except on the grand scale,' or 'Thou shalt not kill except when the national leaders say to do so'?

Science is the search for truth - it is not a game in which one tries to beat his opponent, to do harm to others.

Nations keep agreements, keep their treaties so long as they continue to do them good.

In teaching, you do not want to COVER things, you want to UNCOVER them. The best way to get good ideas is to have lots of ideas.

If you want to have good ideas you must have many ideas.

During the time that [Karl] Landsteiner gave me an education in the field of imununology, I discovered that he and I were thinking about the serologic problem in very different ways. He would ask, What do these experiments force us to believe about the nature of the world? I would ask, What is the most. simple and general picture of the world that we can formulate that is not ruled by these experiments? I realized that medical and biological investigators were not attacking their problems the same way that theoretical physicists do, the way I had been in the habit of doing.

You can't have good ideas unless you have lots of ideas.