During the Middle Ages there were all kinds of crazy ideas, such as that a piece of rhinoceros horn would increase potency. Then a method was discovered for separating the ideas - which was to try one to see if it worked, and if it didn't work, to eliminate it. This method became organized, of course, into science.
Richard P. FeynmanThe other thing that gives a scientific man the creeps in the world today are the methods of choosing leaders - in every nation. Today, for example, in the United States, the two political parties have decided to employ public relations men, that is, advertising men, who are trained in the necessary methods of telling the truth or lying in order to develop a product.
Richard P. FeynmanIt is important to realize that in physics today, we have no knowledge of what energy is
Richard P. FeynmanThe electron is a theory. But the theory is so good we can almost consider them real.
Richard P. Feynman