You see, one thing is, I can live with doubt and uncertainty and not knowing. I have approximate answers and possible beliefs and different degrees of certainty about different things... It doesn't frighten me.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

Science is a way for us to not fool ourselves.

The inside of a computer is as dumb as hell but it goes like mad!

There is nothing in biology yet found that indicates the inevitability of death. This suggests to me that it is not at all inevitable and that it is only a matter of time before biologists discover what it is that is causing us the trouble.

Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question - to doubt - to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.

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