Enthusiasm is followed by disappointment and even depression, and then by renewed enthusiasm.

Think how hard physics would be if particles could think

I would recommend that skeptics devote even more effort than they do now to understanding the reasons why so many people want or need to believe.

Everything that is not forbidden is compulsory.

Of course the word chaos is used in rather a vague sense by a lot of writers, but in physics it means a particular phenomenon, namely that in a nonlinear system the outcome is often indefinitely, arbitrarily sensitive to tiny changes in the initial condition

We are driven by the usual insatiable curiosity of the scientist, and our work is a delightful game.

Bush is a nice fellow who gives very good parties. I just wish someone would find him a better job than running the country.