“psychoanalysis is not a science: it is at best a medical process, and perhaps even more like witch-doctoring.” — 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
Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to… — 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
You should not fool the laymen when you're talking as a scientist... . I'm talking about a specific, extra type of integrity… — Richard P. Feynman Copy Share Image
We've learned from experience that the truth will come out. Other experimenters will repeat your experiment and find out whether you were… — Richard P. Feynman Copy Share Image
There is no harm in doubt and skepticism, for it is through these that new discoveries are made. — Richard P. Feynman Copy Share Image
I think it's much more interesting to live not knowing than to have answers which might be wrong. — Richard P. Feynman Copy Share Image
We find that the statements of science are not of what is true and what is not true, but statements of what… — Richard P. Feynman Copy Share Image
What I am going to tell you about is what we teach our physics students in the third or fourth year of… — Richard P. Feynman Copy Share Image
Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very… — Richard P. Feynman Copy Share Image
“I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to… — Richard P. Feynman Copy Share Image
Unless a thing can be defined by measurement, it has no place in a theory. And since an accurate value of the… — Richard P. Feynman Copy Share Image
“Mathematics is not a science from our point of view, in the sense that it is not a natural science. The test… — Richard P. Feynman Copy Share Image
It is not unscientific to make a guess, although many people who are not in science think it is. — Richard P. Feynman Copy Share Image
The present situation in physics is as if we know chess, but we don't know one or two rules. — Richard P. Feynman Copy Share Image
A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning. — Richard P. Feynman Copy Share Image
I think that when we know that we actually do live in uncertainty, then we ought to admit it; it is of… — Richard P. Feynman Copy Share Image
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. — Richard P. Feynman Copy Share Image
We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But… — 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 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
Before I was born, my father told my mother, 'If it's a boy, he's going to be a scientist.' — Richard P. Feynman Copy Share Image
It is surprising that people do not believe that there is imagination in science. It is a very interesting kind of imagination,… — 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
