We absolutely must leave room for doubt or there is no progress and no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty.
Richard P. FeynmanYou see, I get such fun out of thinking that I don't want to destroy this most pleasant machine that makes life such a big kick.
Richard P. FeynmanThe Quantum Universe has a quotation from me in every chapter - but it's a damn good book anyway.
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