Richard Feynman

"Different fields develop at different rates and in different ways."

"The deepest principle for which we believe nature is based on is the principle of least action."

"What is it about nature that lets it work so simply?"

"I didn't understand the problem, so I made something up."

"A Feynman, a Fermi, and a Fowler walk into a bar."

"The effort to understand the universe is one of the few things that lifts human life above the level of farce."

"Do not keep saying to yourself how awful or difficult this all is."

"The probability of something impossible occurring is zero."

"The game is to find questions that do and don't have definite answers."

"We are very lucky to live in a time when we still make discoveries."

"The moment you have any idea of how to check something, you're free."

"Creativity is imagination mixed with knowledge."

"The purpose of an education is to add to what we can understand."

"Facts are hard to come by, but they're worth whatever effort they take."

"No problem is beneath you or too difficult for you."

"What matters is not knowing all the answers, but being curious about the questions."

"There is pleasure in the details."

"Money is a solution to certain problems; it's not a solution to a lot of others."

"One of the greatest discoveries I ever made was finding out something new."

"Thinking is uncomfortable, but having fixed ideas is comfortable."

"The world looks so different after learning science."

"The good thing about science is that hard truths will keep showing up."

"Everything is made of atoms, but the real power is in the connections."

"There's plenty of room at the bottom."

"An expert is someone who knows how much they still have to learn."

"I have far more respect for people who change their minds than who stand by a bad idea."

"The first principle is not to fool yourself because that's where you're easiest to fool."

"Time is running and you keep wanting to fly."

"Never accept authority blindly; test everything yourself."

"I wonder why I wanted to live so long."