If all of mathematics disappeared, physics would be set back by exactly one week. — Richard P. Feynman Copy Share Image
That is the logical tight-rope on which we have to walk if we wish to interpret nature. — Richard P. Feynman Copy Share Image
If you think you understand quantum mechanics, you don't understand quantum mechanics. — Richard P. Feynman Copy Share Image
What would happen if we could arrange the atoms one by one the way we want them? — Richard P. Feynman Copy Share Image
If a guy tells me the probability of failure is 1 in 100,000, I know he's full of crap. — Richard P. Feynman Copy Share Image
If you can't explain something to a first year student, then you haven't really understood . — Richard P. Feynman Copy Share Image
If you have any talent, or any occupation that delights you, do it, and do it to the hilt. Don't ask why,… — 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
If you know that you are not sure, you have a chance to improve the situation. I want to demand this freedom… — Richard P. Feynman Copy Share Image
Everybody who reasons carefully about anything is making a contribution ... and if you abstract it away and send it to the… — Richard P. Feynman Copy Share Image
If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives. — Richard P. Feynman Copy Share Image
If you don't like it, go somewhere else, to another universe where the rules are simpler. — 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
The only way to have real success in science, the field I'm familiar with, is to describe the evidence very carefully without… — Richard P. Feynman Copy Share Image
I am going to tell you what nature behaves like. If you will simply admit that maybe she does behave like this,… — Richard P. Feynman Copy Share Image
The most important thing I found out from my father is that if you asked any question and pursued it deeply enough,… — 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
In any organization there ought to be the possibility of discussion... fence sitting is an art, and it's difficult, and it's important… — 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
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
Nature isn't classical, dammit, and if you want to make a simulation of nature, you'd better make it quantum mechanical, and by… — Richard P. Feynman Copy Share Image
I learned a lot of different things from different schools. MIT is a very good place…. It has developed for itself a… — Richard P. Feynman Copy Share Image
If you're doing an experiment, you should report everything that you think might make it invalid - not only what you think… — 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
To do any important work in physics a very good mathematical ability and aptitude are required. Some work in applications can be… — 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
It is going to be necessary that everything that happens in a finite volume of space and time would have to be… — 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
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
Light is something like raindrops each little lump of light is called a photon and if the light is all one color,… — Richard P. Feynman Copy Share Image
If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size… — Richard P. Feynman Copy Share Image
To guess what to keep and what to throw away takes considerable skill. Actually it is probably merely a matter of luck,… — Richard P. Feynman Copy Share Image
If all of this, all the life of a stream of water, can be nothing but a pile of atoms, how much… — 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
It does not matter who you are, or how smart you are, or what title you have, or how many of you… — Richard P. Feynman Copy Share Image
Only realistic flight schedules should be proposed, schedules that have a reasonable chance of being met. If in this way the government… — Richard P. Feynman Copy Share Image
If you keep proving stuff that others have done, getting confidence, increasing the complexities of your solutions - for the fun of… — Richard P. Feynman Copy Share Image
We cannot define anything precisely. If we attempt to, we get into the paralysis of thought that comes to philosophers, who sit… — 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
“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
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
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
Mathematics is a language plus reasoning; it is like a language plus logic. Mathematics is a tool for reasoning. — Richard P. Feynman Copy Share
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
“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
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
“There's a big difference between knowing the name of something and knowing something.” — Richard P. Feynman Copy Share
The fact that you are not sure means that it is possible that there is another way someday. — Richard P. Feynman Copy Share
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
Mathematics is not just a language. Mathematics is a language plus reasoning. — Richard P. Feynman Copy Share
A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that,… — Richard P. Feynman Copy Share
I was a very shy character, always feeling uncomfortable because everybody was stronger than I, and always afraid I would look like a sissy.… — Richard P. Feynman Copy Share
![“If I say [electrons] behave like particles I give the wrong impression; also if I say they behave like waves. They behave in their own inimitable way, which technically could be called a quantum mechanical way. They behave in a way that is like nothing that you have seen before.” quote by Richard P. Feynman](https://sms4smile.com/quotes/i/fd0/richard-p-feynman-495_behave_if-i-say-electrons-behave-like-particles_1495136.png)
