There is no authority who decides what is a good idea.

We have found it of paramount importance that in order to progress, we must recognize our ignorance and leave room for doubt.

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.

Some things that satisfy the rules of algebra can be interesting to mathematicians even though they don't always represent a real situation.

The game I play is a very interesting one. It's imagination in a straightjacket, which is this: that it has to agree with the known laws of physics. ... It requires imagination to think of what's possible, and then it requires an analysis back, checking to see whether it fits, whether its allowed, according to what's known, okay?

We've learned from experience that the truth will out.

It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human beings in some direction that doesn't get confined, permanently blocked, as it has so many times before in various periods in the history of man.