M-Theory: The Mother of All Superstrings.

Since the mathematicians have invaded the theory of relativity, I do not understand it myself anymore.

Thus the partial differential equation entered theoretical physics as a handmaid, but has gradually become mistress.

Relativity applies to physics, not ethics

It is the theory that decides what can be observed

When I am judging a theory, I ask myself whether, if I were God, I would have arranged the world in such a way.