Richard Feynman

"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 most important thing."

"You don't have to know everything to do something."

"Everybody is ignorant, just in different ways."

"Science is a way of thinking much more than it is a body of knowledge."

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

"The imaginative part of us is itching, always looking for a new way to see things."

"Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats."

"Learning is like rowing upstream: not advancing is the same as going back."

"Nature isn't complicated, it just is."

"The man who enjoys his work is a happy man."

"I am not going to sit here and pretend to be something I'm not."

"Being in love is a religious experience, but it has nothing to do with God."

"I want to turn the crank of the universe and watch it go."

"The best thing for being sad is to do something."

"There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion."

"Do not worry about your difficulties in mathematics; I can assure you that mine are still greater."

"If you wish to make an apple pie from scratch, you must first invent the universe."

"The problem is we're teaching the technique of how to pass exams instead of teaching how to learn."

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

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

"There is almost no experiment that cannot be made more and more precise."

"Innovation requires having floating thoughts and spending time just thinking."

"I have approximate answers and possible beliefs about different things, but I'm not absolutely sure of anything."

"The effort to think clearly is the hardest work anyone can do."

"I don't believe I can really do without mathematics any longer in physics."

"Curiosity will always lead to discovery."

"What do you care what other people think?"

"Find one thing you really like about yourself and focus on that."