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

Even if there is only one possible unified theory, it is just a set of rules and equations. What is it that breathes fire into the equations and makes a universe for them to describe?

So Einstein was wrong when he said, "God does not play dice." Consideration of black holes suggests, not only that God does play dice, but that he sometimes confuses us by throwing them where they can't be seen.

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.

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."

When we understand string theory, we will know how the universe began. It won't have much effect on how we live, but it is important to understand where we come from and what we can expect to find as we explore.