If we find the answer [the unified theory], it would be the ultimate triumph of human reason -- for we would know the mind of God."

If we do discover a complete theory, it should be in time understandable in broad principle by everyone . . . . Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.

. . .a scientific theory is just a mathematical model we make to describe our observations: it exists only in our minds. So it is meaningless to ask: which is real, "real" or "imaginary" time? It is simply a matter of which is the more useful description.

M-theory is the unified theory Einstein was hoping to find.

The cyclic universe theory predicts no gravitational waves from the early universe.

I have hardly ever known a mathematician who was able to reason