Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes… — Richard P. Feynman Copy Share Image
What is the fundamental hypothesis of science, the fundamental philosophy? We stated it in the first chapter: the sole test of the… — 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
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
I don't believe I can really do without teaching. The reason is, I have to have something so that when I don't… — Richard P. Feynman Copy Share Image
In talking about the impact of ideas in one field on ideas in another field, one is always apt to make a… — 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
John von Neumann gave me an interesting idea: that you don't have to be responsible for the world that you're in. So… — Richard P. Feynman Copy Share Image
I think, however, that there isn't any solution to this problem of education other than to realize that the best teaching can… — Richard P. Feynman Copy Share Image
We have a habit in writing articles published in scientific journals to make the work as finished as possible, to cover up… — Richard P. Feynman Copy Share Image
Science is a process for learning about nature in which competing ideas about how the world works are measured against observations. — Richard P. Feynman Copy Share Image
This is the key of modern science and is the beginning of the true understanding of nature. This idea. That to look… — Richard P. Feynman Copy Share Image
To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word. — Richard P. Feynman Copy Share Image
You know how it always is, every new idea, it takes a generation or two until it becomes obvious that there's no… — Richard P. Feynman Copy Share Image
The idea that no one really knew how to run a government led to the idea that we should arrange a system… — Richard P. Feynman Copy Share Image
To develop working ideas efficiently, I try to fail as fast as I can. — Richard P. Feynman Copy Share Image
During the Middle Ages there were all kinds of crazy ideas, such as that a piece of rhinoceros horn would increase potency.… — 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
