Richard P. Feynman Quotes

I've always been fascinated by quantum physics and the possibility of alternate realities.

… theoretical physics is actual philosophy. It has revolutionized fundamental concepts, e.g., about space and time (relativity), about causality (quantum theory), and about substance and matter (atomistics), and it has taught us new methods of thinking (complementarity) which are applicable far beyond physics.

The biggest conceptual change over the last 100 years in the way physicists think about the world is symmetry.

You're only a man! You've not our gifts! I can tell you! Why, a woman can think of a hundred different things at once, all them contradictory!

In the most modern theories of physics probability seems to have replaced aether as "the nominative of the verb 'to undulate'."

For me, [John Wheeler] was the last Titan, the only physics superhero still standing.

When I was young, Stephen Hawking wasn't the world's most famous physicist. The fame didn't arrive until the publication of "A Brief History of Time," by which time I was in my late teens. When I was a child, he was well known among physicists, but they are a fairly select, serious bunch, not much given to celebrity idolizing.

[My favorite scientist] Michio Kaku. He deals with wormholes. Check him out. He's great.

Michio Kaku and Albert Einstein, they're both so ahead of our time. It's just fascinating to read about them, what their theories are on loopholes and everything else. It's fascinating stuff.

A theorist today is hardly considered respectable if he or she has not introduced at least one new particle for which there is no experimental evidence.

Classical physics has been superseded by quantum theory: quantum theory is verified by experiments. Experiments must be described in terms of classical physics.

Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness.

A lot of my theories were not applicable as a closer

A state of negative energy means that you are essentially getting something for nothing.

I think being an actor in general is acknowledging that we are constantly playing different roles, that we have all these different parts of ourselves and instead of pretending that you are just one thing, as an actor you get to admit that you've got all this stuff going on.

In our work, we are always between Scylla and Charybdis; we may fail to abstract enough, and miss important physics, or we may abstract too much and end up with fictitious objects in our models turning into real monsters that devour us.

Some physicists describe gravity in terms of ten dimensions all curled up. But those aren't real words-just placeholders, used to refer to parts of abstract equations.

Einstein's theory, we know that it fails. In advance, we know it fails. So that a deeper understanding of nature is awaiting us.

I made a lot of changes in my life between my twenties and thirties, and it all sort of revolves around how I think people with nerdier brains tend to problem-solve and approach things differently then "norms."

Anyone who can contemplate quantum mechanics without getting dizzy hasn't understood it.

I think I can safely say that nobody understands Quantum Mechanics.

Physics is an otherworld thing, it requires a taste for things unseen, even unheard of- a high degree of abstraction... These faculties die off somehow when you grow up... profound curiosity happens when children are young. I think physicists are the Peter Pans of the human race... Once you are sophisticated, you know too much- far too much. Pauli once said to me, "I know a great deal. I know too much. I am a quantum ancient.".

I was struck by - Einstein's a fascinating figure who didn't have any instruments that he used, he didn't use telescopes, he used his mind to try to understand the universe.

Revolutionary art and visionary physics are both investigations into the nature of reality.

We may as well cut out group theory. That is a subject that will never be of any use in physics.