Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Science is what we do to keep us from lying to ourselves

The problem of creating something new, but which is consistent with everything which has been seen before, is one of extreme difficulty.

It is odd, but on the infrequent occasions when I have been called upon in a formal place to play the bongo drums, the introducer never seems to find it necessary to mention that I also do theoretical physics.

The female mind is capable of understanding analytic geometry... The difficulty may just be that we have never yet discovered a way to communicate with the female mind. If it is done in the right way, you may be able to get something out of it.

But there is nothing in biology yet found that indicates the inevitability of death.

I do believe that there is a conflict between science and religion ... the spirit or attitude toward the facts is different in religion from what it is in science. The uncertainty that is necessary in order to appreciate nature is not easily correlated with the feeling of certainty in faith.