Start out understanding religion by saying everything is possibly wrong... As soon as you do that, you start sliding down an edge which is hard to recover from.

We scientists are clever — too clever — are you not satisfied? Is four square miles in one bomb not enough? Men are still thinking. Just tell us how big you want it!

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter.

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

Some people think Wheeler's gotten crazy in his later years, but he's always been crazy.

To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word.

Poets say science takes away from the beauty of stars-mere globs of gas atoms. Nothing is "mere". I too see the stars on a desert night, and feel them. But do I see less or more? ...What is the pattern, or the meaning, or the why? It does not do harm to the mystery to know a little more about it. For far more marvelous is the truth than any artists of the past imagined it.