Einstein's gravitational theory, which is said to be the greatest single achievement of theoretical physics, resulted in beautiful relations connecting gravitational phenomena with the geometry of space; this was an exciting idea.Richard Feynman
Today, all physicists know from studying Einstein and Bohr that sometimes an idea which looks completely paradoxical at first, if analyzed to completion in all detail and in experimental situations, may, in fact, not be paradoxical.Richard Feynman
Scientific views end in awe and mystery, lost at the edge in uncertainty, but they appear to be so deep and so impressive that the theory that it is all arranged as a stage for God to watch man's struggle for good and evil seems inadequate.Richard Feynman
The situation in the sciences is this: A concept or an idea which cannot be measured or cannot be referred directly to experiment may or may not be useful. It need not exist in a theory.Richard Feynman
When I was about thirteen, the library was going to get 'Calculus for the Practical Man.' By this time I knew, from reading the encyclopedia, that calculus was an important and interesting subject, and I ought to learn it.Richard Feynman
Today we say that the law of relativity is supposed to be true at all energies, but someday somebody may come along and say how stupid we were.Richard Feynman
The thing that doesn't fit is the thing that's the most interesting: the part that doesn't go according to what you expected.Richard Feynman
The universe is very large, and its boundaries are not known very well, but it is still possible to define some kind of a radius to be associated with it.Richard Feynman
