The first principle is that you must not fool yourself — and you are the easiest person to fool. So you have to be very careful about that. After you… - Richard Feynman

" "

The first principle is that you must not fool yourself — and you are the easiest person to fool. So you have to be very careful about that. After you’ve not fooled yourself, it’s easy not to fool other scientists. You just have to be honest in a conventional way after that.

English
Collect this quote

About Richard Feynman

Richard Phillips Feynman (May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is known for the work he did in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model. For his contributions to the development of quantum electrodynamics, Feynman received the Nobel Prize in Physics in 1965 jointly with Julian Schwinger and Shin'ichirō Tomonaga. Feynman developed a widely used pictorial representation scheme for the mathematical expressions describing the behavior of subatomic particles, which later became known as Feynman diagrams. During his lifetime, Feynman became one of the best-known scientists in the world.

Biography information from Wikiquote

Also Known As

Native Name: Richard Phillips Feynman
Alternative Names: Ofey Feynman Dick Feynman Richard P. Feynman
Works in ChatGPT, Claude, or Any AI

Add semantic quote search to your AI assistant via MCP. One command setup.

Related quotes. More quotes will automatically load as you scroll down, or you can use the load more buttons.

Shorter versions of this quote

"The first person you should be careful not to fool is yourself. Because you are the easiest person to fool".

Science is a way of trying not to fool yourself. The principle is that you must not fool yourself, and you are the easiest person to fool.

Go Premium

Support Quotewise while enjoying an ad-free experience and premium features.

View Plans
You must not fool yourself — and you are the easiest person to fool.

Additional quotes by Richard Feynman

"Why make yourself miserable saying things like, "Why do we have such bad luck? What has God done to us? What have we done to deserve this?" - all of which, if you understand reality and take it completely into your heart, are irrelevant and unsolvable. They are just things that nobody can know. Your situation is just an accident of life."

Limited Time Offer

Premium members can get their quote collection automatically imported into their Quotewise collections.

That was the beginning and the idea seemed so obvious to me that I fell deeply in love with it. And, like falling in love with a woman, it is only possible if you don't know too much about her, so you cannot see her faults. The faults will become apparent later, but after the love is strong enough to hold you to her. So, I was held to this theory, in spite of all the difficulties, by my youthful enthusiasm.

Loading...