Although it is uncertain, it is necessary to make science useful. Science is only useful if it tells you about some experiment that has not been done; it is not good if it only tells you what just went on.
Richard P. FeynmanIt doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.
Richard P. FeynmanThere was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time ... On the other hand, I think I can safely say that nobody understands quantum mechanics.
Richard P. FeynmanPeople often think I'm a faker, but I'm usually honest, in a certain way--in such a way that often nobody believes me!
Richard P. Feynman