“If you can’t explain it simply, you don’t understand it well enough.”


“Two things are infinite: the universe and human stupidity; and I’m not sure about the universe.”


“There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.”


“If you can’t explain it to a six year old, you don’t understand it yourself.”
“Logic will get you from A to Z; imagination will get you everywhere.”


“Anyone who has never made a mistake has never tried anything new.”


“I speak to everyone in the same way, whether he is the garbage man or the president of the university.”


“A clever person solves a problem. A wise person avoids it.”


“If we knew what it was we were doing, it would not be called research, would it?”


“I have no special talents. I am only passionately curious.”


“The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.”


“You never fail until you stop trying.”


“Creativity is intelligence having fun.” “Black holes are where God divided by zero.”


“Everything must be made as simple as possible. But not simpler.”
“If at first the idea is not absurd, then there is no hope for it.”


“One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike — and yet it is the most precious thing we have.”


“The true sign of intelligence is not knowledge but imagination.”


“Energy cannot be created or destroyed, it can only be changed from one form to another.”


“A man should look for what is, and not for what he thinks should be.”


“I never teach my pupils, I only attempt to provide the conditions in which they can learn.”


“The only sure way to avoid making mistakes is to have no new ideas.”


“Life isn’t worth living, unless it is lived for someone else.”


“You have to learn the rules of the game. And then you have to play better than anyone else.”


“The more I learn, the more I realize how much I don’t know.”


“Past is dead Future is uncertain; Present is all you have, So eat, drink and live merry.”


“At least once a day, allow yourself the freedom to think and dream for yourself.”


“Learning is experience. Everything else is just information.”


“No amount of experimentation can ever prove me right; a single experiment can prove me wrong.”