The first principle is that you must not fool yourself — and you are the easiest person to fool. So you have to be very careful about that. After you… - Richard Feynman

"The first person you should be careful not to fool is yourself. Because you are the easiest person to fool".

Science is a way of trying not to fool yourself. The principle is that you must not fool yourself, and you are the easiest person to fool.

You must not fool yourself — and you are the easiest person to fool.

The first principle is that you must not fool yourself — and you are the easiest person to fool.

The first principle is that you must not fool yourself, and you are the easiest person to fool.

Anyway, Smith told me to sign some papers for the three ideas I was giving to the government to patent. Now, it’s some dopey legal thing, but when you give the patent to the government, the document you sign is not a legal document unless there’s some exchange, so the paper I signed said, “For the sum of one dollar, I, Richard P. Feynman, give this idea to the government…” I sign the paper. “Where’s my dollar?” “That’s just a formality,” he says. “We haven’t got any funds set up to give a dollar.” “You’ve got it all set up that I’m signing for the dollar,” I say. “I want my dollar!” “This is silly,” Smith protests. “No, it’s not,” I say. “It’s a legal document. You made me sign it, and I’m an honest man. If I sign something that says I got a dollar, I’ve gotta get a dollar. There’s no fooling around about it.” “All right, all right!” he says, exasperated. “I’ll give you a dollar, from my pocket!” “OK.” I take the dollar, and I realize what I’m going to do. I go down to the grocery store, and I buy a dollar’s worth — which was pretty good, then — of cookies and goodies, those chocolate goodies with marshmallow inside, a whole lot of stuff. I come back to the theoretical laboratory, and I give them out: “I got a prize, everybody! Have a cookie! I got a prize! A dollar for my patent! I got a dollar for my patent!” Everybody who had one of those patents — a lot of people had been sending them in — everybody comes down to Captain Smith: they want their dollar!

Poets say science takes away from the beauty of the stars — mere globs of gas atoms. Nothing is "mere". I too can see the stars on a desert night, and feel them. But do I see less or more? The vastness of the heavens stretches my imagination — stuck on this carousel my little eye can catch one-million-year-old light. A vast pattern — of which I am a part... What is the pattern, or the meaning, or the why? It does not do harm to the mystery to know a little about it. For far more marvelous is the truth than any artists of the past imagined! Why do the poets of the present not speak of it? What men are poets who can speak of Jupiter if he were a man, but if he is an immense spinning sphere of methane and ammonia must be silent?

Why are all the theories of physics so similar in their structure?

There are a number of possibilities. The first is the limited imagination of physicists: when we see a new phenomenon we try to fit it into the framework we already have-until we have made enough experiments, we don't know that it doesn't work.

Another possibility is that it is the same damn thing over and over again-that Nature has only one way of doing things, and She repeats her story from time to time.

A third possibility is that things look similar because they are aspects of the same thing- some larger picture underneath, from which things can be broken into parts that look different, like fingers on the same hand. Many physicists are working very hard trying to put together a grand picture that unifies everything into one super-duper model. It's a delightful game, but at the present time none of the speculators agree with any of the other speculators as to what the grand picture is.