Douglas Smith

“It doesn't make a difference how beautiful your guess is. It doesn't make a difference how smart you are, who made the guess, or what his name is. If it disagrees with experiment, it's wrong.”
― Richard Feynman, The Feynman Lectures on Physics

“The game I play is a very interesting one. It's imagination, in a tight straightjacket.”
― Richard P. Feynman

“I can calculate the motion of heavenly bodies but not the madness of people.”
― Isaac Newton

“The first principle is that you must not fool yourself and you are the easiest person to fool.”
― Richard P. Feynman