When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.
Richard P. FeynmanScientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to use it.
Richard P. FeynmanIt does not make any difference how beautiful your guess is. It does not make any difference how smart you are, who made the guess, or what his name is if it disagrees with experiment it is wrong. That is all there is to it.
Richard P. FeynmanI'm going to play with physics, whenever I want to, without worrying about any importance whatsoever.
Richard P. FeynmanThus we can get the correct answer for the probability of partial reflection by imagining (falsely) that all reflection comes from only the front and back surfaces. In this intuitively easy analysis, the 'front surface' and 'back surface' arrows are mathematical constructions that give us the right answer, whereas .... a more accurate representation of what is really going on: partial reflection is the scattering of light by electrons inside the glass.
Richard P. Feynman