I've always been very one-sided about science, and when I was younger, I concentrated almost all my effort on it. — Richard P. Feynman Copy Share Image
It is always good to know which ideas cannot be checked directly, but it is not necessary to remove them all. It… — Richard P. Feynman Copy Share Image
I don't feel frightened by not knowing things, by being lost in a mysterious universe without any purpose, which is the way… — Richard P. Feynman Copy Share Image
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
The ideas associated with the problems of the development of science, as far as I can see by looking around me, are… — Richard P. Feynman Copy Share Image
Observation, reason, and experiment make up what we call the scientific method. — Richard P. Feynman Copy Share Image
Scientific knowledge is a body of statements of varying degrees of certainty -- some most unsure, some nearly sure, none absolutely certain. — Richard P. Feynman Copy Share Image
If you thought that science was certain - well, that is just an error on your part. — Richard P. Feynman Copy Share Image
The difficulty really is psychological and exists in the perpetual torment that results from your saying to yourself, "But how can it… — Richard P. Feynman Copy Share Image
To decide upon the answer is not scientific. In order to make progress, one must leave the door to the unknown ajar… — Richard P. Feynman Copy Share Image
“You know, the most amazing thing happened to me tonight... I saw a car with the license plate ARW 357. Can you… — Richard P. Feynman Copy Share Image
It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's… — Richard P. Feynman Copy Share Image
“I believe that we must attack these things in which we do not believe. Not attack by the method of cutting off… — Richard P. Feynman Copy Share Image
I learned very early the difference between knowing the name of something and knowing something. — Richard P. Feynman Copy Share Image
We are very lucky to be living in an age in which we are still making discoveries. It is like the discovery… — Richard P. Feynman Copy Share Image
When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the… — Richard P. Feynman Copy Share Image
The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment. — Richard P. Feynman Copy Share Image
Poets say science takes away from the beauty of stars-mere globs of gas atoms. Nothing is "mere". I too see the stars… — Richard P. Feynman Copy Share Image
Computer science is not as old as physics; it lags by a couple of hundred years. However, this does not mean that… — Richard P. Feynman Copy Share Image
If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors… — Richard P. Feynman Copy Share Image
It is the facts that matter, not the proofs. Physics can progress without the proofs, but we can't go on without the… — Richard P. Feynman Copy Share Image
Doubt is clearly a value in science. It is important to doubt and that the doubt is not a fearful thing, but… — Richard P. Feynman Copy Share Image
We scientists are clever — too clever — are you not satisfied? Is four square miles in one bomb not enough? Men… — 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
