All the time you're saying to yourself, 'I could do that, but I won't,'--which is just another way of saying that you can't.
Richard P. FeynmanSome people think Wheeler's gotten crazy in his later years, but he's always been crazy.
Richard P. FeynmanLooking back at the worst times, it always seems that they were times in which there were people who believed with absolute faith and absolute dogmatism in something. And they were so serious in this matter that they insisted that the rest of the world agree with them. And then they would do things that were directly inconsistent with their own beliefs in order to maintain that what they said was true.
Richard P. FeynmanWhat I am going to tell you about is what we teach our physics students in the third or fourth year of graduate school... It is my task to convince you not to turn away because you don't understand it. You see my physics students don't understand it... That is because I don't understand it. Nobody does.
Richard P. Feynman