One interesting notion exemplified in this article is the importance of intuition in science. There is a lot of noise made about empiricism and accumulation of data - but scientific endeavor necessarily begins with a hypothesis, an act of pure intuition. In this case, Einstein was acting on the data and inferences from well-known experiments. What he added was only a new understanding. This is perhaps the most visible and celebrated example of this sort of intuitive leap, but really every scientific endeavor must contain this kind of thinking.