I was born not knowing and have had only a little time to change that here and there.
Richard P. FeynmanIn fact the total amount that a physicist knows is very little. He has only to remember the rules to get him from one place to another and he is all right.
Richard P. FeynmanNo man is rich who is unsatisfied, but who wants nothing possess his heart's desire.
Richard P. FeynmanWe cannot define anything precisely. If we attempt to, we get into the paralysis of thought that comes to philosophers, who sit opposite each other, one saying to the other, "You don't know what you are talking about!" The second one says, "What do you mean by know? What do you mean by talking? What do you mean by you?"
Richard P. Feynman