It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

Children in backseats cause accidents. Accidents in backseats cause children.

What was God doing before the divine creation? Was he preparing hell for people who asked such questions?

The whole history of science has been the gradual realization that events do not happen in an arbitrary manner, but that they reflect a certain underlying order, which may or may not be divinely inspired.