A very great deal more truth can become known than can be proven.

Science alone of all the subjects contains within itself the lesson of the danger of belief in the infallibility of the greatest teachers of the preceding generation.

A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.

The theoretical broadening which comes from having many humanities subjects on the campus is offset by the general dopiness of the people who study these things.

All mass is interaction.

I learned very early the difference between knowing the name of something and knowing something.

No one really understands quantum mechanics.