---
title: "1 Theoretical Physicist Quotes By Richard P. Feynman"
description: "1 Theoretical Physicist quotes by Richard P. Feynman. Plus more from Richard P. Feynman and more Theoretical Physicist sayings from other authors."
image: "https://sms4smile.com/quotes/i/b45/richard-p-feynman-495_different_therefore-psychologically-we-must-keep-a_900983.png"
---

> [Therefore psychologically we must keep all the theories in our heads, and every theoretical physicist who is any good knows six or seven different theoretical representations for exactly the same physics.](https://sms4smile.com/quotes/richard-p-feynman/therefore-psychologically-we-must-keep-all-the-theories-in-our-heads/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

[Image](https://sms4smile.com/quotes/i/b45/richard-p-feynman-495_different_therefore-psychologically-we-must-keep-a_900983.png)

## More by Richard P. Feynman

> [“Philosophers have said before that one of the fundamental requisites of science is that whenever you set up the same conditions, the same thing…](https://sms4smile.com/quotes/richard-p-feynman/philosophers-have-said-before-that-one-of-the-fundamental-requisites/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [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…](https://sms4smile.com/quotes/richard-p-feynman/my-rule-is-when-you-are-unhappy-think-about-it-but-when-you-re-happy/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic…](https://sms4smile.com/quotes/richard-p-feynman/trying-to-understand-the-way-nature-works-involves-a-most-terrible/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [Today's brains are yesterday's mashed potatoes.](https://sms4smile.com/quotes/richard-p-feynman/today-s-brains-are-yesterday-s-mashed-potatoes/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [Mathematics is a language plus reasoning; it is like a language plus logic. Mathematics is a tool for reasoning.](https://sms4smile.com/quotes/richard-p-feynman/mathematics-is-a-language-plus-reasoning-it-is-like-a-language-plus/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions.](https://sms4smile.com/quotes/richard-p-feynman/it-is-necessary-for-the-very-existence-of-science-that-minds-exist/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [“There was a Princess Somebody of Denmark sitting at a table with a number of people around her, and I saw an empty chair…](https://sms4smile.com/quotes/richard-p-feynman/there-was-a-princess-somebody-of-denmark-sitting-at-a-table-with-a/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [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.](https://sms4smile.com/quotes/richard-p-feynman/all-the-time-you-re-saying-to-yourself-i-could-do-that-but-i-won-t/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [“There's a big difference between knowing the name of something and knowing something.”](https://sms4smile.com/quotes/richard-p-feynman/there-s-a-big-difference-between-knowing-the-name-of-something-and/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [The fact that you are not sure means that it is possible that there is another way someday.](https://sms4smile.com/quotes/richard-p-feynman/the-fact-that-you-are-not-sure-means-that-it-is-possible-that-there/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [You can always recognize truth by its beauty and simplicity.](https://sms4smile.com/quotes/richard-p-feynman/you-can-always-recognize-truth-by-its-beauty-and-simplicity/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [One cannot understand... the universality of laws of nature, the relationship of things, without an understanding of mathematics. There is no other way to…](https://sms4smile.com/quotes/richard-p-feynman/one-cannot-understand-the-universality-of-laws-of-nature-the/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [Mathematics is not just a language. Mathematics is a language plus reasoning.](https://sms4smile.com/quotes/richard-p-feynman/mathematics-is-not-just-a-language-mathematics-is-a-language-plus/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that,…](https://sms4smile.com/quotes/richard-p-feynman/a-poet-once-said-the-whole-universe-is-in-a-glass-of-wine-we-will/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

> [I was a very shy character, always feeling uncomfortable because everybody was stronger than I, and always afraid I would look like a sissy.…](https://sms4smile.com/quotes/richard-p-feynman/i-was-a-very-shy-character-always-feeling-uncomfortable-because/)

[Richard P. Feynman](https://sms4smile.com/quotes/author/richard-p-feynman/)

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