“All truths are easy to understand once they are discovered; the point is to discover them.” — Galileo Galilei

“Beauty is truth, truth beauty, — that is all
Ye know on earth, and all ye need to know.” — Keats

“Make everything as simple as possible, but not simpler.” — Albert Einstein

“When I am working on a problem I never think about beauty. I only think about how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong.”
— Buckminster Fuller

“I believe that to solve any problem that has never been solved before, you have to leave the door to the unknown ajar. You have to permit the possibility that you do not have it exactly right.” — Richard Feynman

“Each problem that I solved became a rule which served afterwards to solve other problems.”
— Rene Descartes, “Discours de la Methode”

“You can observe a lot just by watching.” — Yogi Berra

“Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions.” — Eric Temple Bell

“I love pictures. Formulas and symbols — I don’t especially like them.” — David Blackwell

“Intuition without concepts is blind.” — Kant

“Basically, I’m not interested in doing research and never I have been. I’m interested in understanding, which is quite a different thing.” — David Blackwell

“The opposite of a correct statement is a false statement. The opposite of a profound truth may well be another profound truth.” — Niels Bohr

“Two paradoxes are better than one; they may even suggest a solution.” — Edward Teller