The principle of science, the definition, almost, is the following: The test of all knowledge is experiment. Experiment is the sole judge… — Richard P. Feynman Copy Share Image
A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he… — Richard P. Feynman Copy Share Image
People are always asking for the latest developments in the unification of this theory with that theory, and they don't give us… — Richard P. Feynman Copy Share Image
If I say [electrons] behave like particles I give the wrong impression; also if I say they behave like waves. They behave… — Richard P. Feynman Copy Share Image
Physics is like sex: sure, it may give some practical results, but that's not why we do it. — Richard P. Feynman Copy Share Image
Thus we can get the correct answer for the probability of partial reflection by imagining (falsely) that all reflection comes from only… — Richard P. Feynman Copy Share Image
The other thing that gives a scientific man the creeps in the world today are the methods of choosing leaders - in… — Richard P. Feynman Copy Share Image
When it came time for me to give my talk on the subject, I started off by drawing an outline of the… — Richard P. Feynman Copy Share Image
“Philosophers have said before that one of the fundamental requisites of science is that whenever you set up the same conditions, the same thing… — Richard P. Feynman Copy Share Image
My rule is, when you are unhappy, think about it. But when you're happy, don't. Why spoil it? You're probably happy for some ridiculous… — Richard P. Feynman Copy Share Image
Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic… — Richard P. Feynman Copy Share Image
Mathematics is a language plus reasoning; it is like a language plus logic. Mathematics is a tool for reasoning. — Richard P. Feynman Copy Share Image
It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions. — Richard P. Feynman Copy Share Image
“There was a Princess Somebody of Denmark sitting at a table with a number of people around her, and I saw an empty chair… — Richard P. Feynman Copy Share Image
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. Feynman Copy Share Image
“There's a big difference between knowing the name of something and knowing something.” — Richard P. Feynman Copy Share Image
The fact that you are not sure means that it is possible that there is another way someday. — Richard P. Feynman Copy Share Image
One cannot understand... the universality of laws of nature, the relationship of things, without an understanding of mathematics. There is no other way to… — Richard P. Feynman Copy Share Image