Feynman, Richard

"The first principle is that you must not fool yourself – and you are the easiest person to fool."

"What I cannot create, I do not understand."

"The pleasure of finding things out is the pleasure of science."

"Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply enough."

"Curiosity is a great motivator."

"The real problem is that I don't know how to think. I have to keep a record of my various mistakes and errors, so I can avoid repeating them."

"You don't have to know that much to figure something out."

"The most important thing is not to stop questioning."

"There is pleasure in the simple things in life."

"Nature is full of surprises; we do not understand it nearly as well as we think we do."

"If you want to teach real science, you have to teach the skepticism."

"I would rather have questions that can't be answered than answers that can't be questioned."

"Everything is made of atoms."

"The principle of science is that all knowledge must be uncertain."

"Science is the belief in the ignorance of experts."

"You see, one thing I must point out is that you cannot prove a vague theory wrong."

"I got a prize for literature, too. I got a Nobel Prize."

"Looking back at the worst times, they seems to show something important happening in my life."

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled."

"It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human knowledge."

"The test of all knowledge is experiment. Experiment is the sole judge of scientific truth."

"I think it is far better to grasp the Universe as it really is than to persist in delusion."

"You are under no obligation to remain the same person you were a year ago."

"The effort to think things through is what God-like activity means to me."

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

"What does it mean to understand something? We construct a mental model."

"I learned very early the difference between knowing the name of something and knowing something."

"All scientists are confused all the time about things."

"Imagine how much harder physics would be if electrons had feelings!"

"The reason we have such a hard time believing in quantum mechanics is that we don't experience it."