642 Quotes by Richard P. Feynman

Once you start doubting, just like you’re supposed to doubt, you ask me if the science is true. You say no, we don’t know what’s true, we’re trying to find out and everything is possibly wrong.

We are not to tell nature what she’s gotta be. She’s always got better imagination than we have.

Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, “Is it reasonable?”

I don’t know what’s the matter with people: they don’t learn by understanding, they learn by some other way – by rote or something. Their knowledge is so fragile!

For a successful technology, reality must take precedence over public relations, for nature cannot be fooled. Upon identifying the reason for the explosion of the space shuttle Challenger and his demonstration using immersion in iced water to show that O-rings grow brittle when cold.

I don’t believe I can really do without teaching.

You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like they expect me to be. It’s their mistake, not my failing.

An ordinary fool isn’t a faker; an honest fool is all right. But a dishonest fool is terrible!

Computer science is not as old as physics; it lags by a couple of hundred years. However, this does not mean that there is significantly less on the computer scientist’s plate than on the physicist’s: younger it may be, but it has had a far more intense upbringing!