Richard Feynman

"I hope I die while still learning, still curious."

"The beauty of nature is that understanding it doesn't diminish wonder."

"Imagination is more important than knowledge – knowledge is limited, imagination is not."

"The principle of science is that you must not fool yourself, and you're the easiest person to fool."

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

"Nature isn't something outside you. It's something you're part of."

"You don't have to know how a radio works to enjoy listening to it."

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

"Do not keep on with a mind that says 'I already know'."

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

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

"Curiosity is a fundamental human drive."

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

"I am not interested in natural philosophy except insofar as it is useful."

"There's a pleasure in recognizing old things from a new point of view."

"Trying to understand quantum mechanics is like trying to understand something that nobody understands."

"The test of all knowledge is experiment."

"Find something that interests you and do it well."

"We are lucky to live in an age in which we still can make discoveries."

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

"You can't blame the world. The world is not to blame."

"All religions tell the same story."

"I learned something today: don't be careful with your money, use it."

"Knowing the name of something doesn't mean you understand it."

"The worthwhile problems are the ones you can really solve or help solve."

"I have approximate answers and possible beliefs about different matters."

"The principle of science is to trust nothing except observed reality."

"Imagination is more important than knowledge."

"Time is the most precious thing we have."

"Don't try to impress other people. Be impressed by nature instead."