Richard Feynman

"The way to get started is to quit talking and begin doing."

"Science is the belief that experts are wrong."

"If you can't explain it to a six year old, you don't understand it."

"Play is the foundation of learning."

"The magnitude of the problem is something like this: What do you do when people of 50 years ago wouldn't do?"

"I never got anywhere by following instructions."

"Everything is interesting if you look at it right."

"The effort to think is the work."

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

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

"The pleasure of finding things out is the basis of all true learning."

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

"Nature uses only the longest threads to weave her patterns."

"The problem is not that there are problems. The problem is expecting otherwise and thinking that having problems is a problem."

"Knowing something is not the same as understanding it."

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

"The idea that truth is hard to come by is nonsense. What is hard is accepting the truth once you've found it."

"Do not keep saying to yourself that you can't do something, or that something is impossible. You only have to do the impossible once to realize it is possible."

"Pay attention to simple things that most people overlook."

"Imagination is more important than knowledge. Knowledge is limited; imagination embraces the entire world and all there ever will be to discover."

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

"If you make an error and do not correct it, this is called an error of quality."

"You can know the name of a bird in all the languages of the world, but when you're done, you'll know absolutely nothing whatever about the bird."

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

"The only way to have real success in science is to describe the evidence very carefully without regard to the way you feel it should be."

"Learn from science that you must doubt the experts."

"I think it's much more interesting to live not knowing than to have answers which might be wrong."

"If you want to understand nature, you must look at her carefully and listen to her patiently."

"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 notice that sometimes the people who think they know everything are the most ignorant."