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.

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.

One can know a man from his laugh and if you like a man's laugh before you know anything of him you may confidently say that he is a good man.

I know you've heard it a thousand times before. But it's true - hard work pays off. If you want to be good you have to practice practice practice. If you don't love something then don't do it.

If there's any message to my work it is ultimately that it's OK to be different that it's good to be different that we should question ourselves before we pass judgment on someone who looks different behaves different talks different is a different color.

What a good thing Adam had. When he said a good thing he knew nobody had said it before.

He must pull out his own eyes and see no creature before he can say he sees no God He must be no man and quench his reasonable soul before he can say to himself there is no God.

If God wants us to do a thing he should make his wishes sufficiently clear. Sensible people will wait till he has done this before paying much attention to him.

Every knee will bend before me and every tongue shall give glory to God.

Cure yourself of the affliction of caring how you appear to others. Concern yourself only with how you appear before God concern yourself only with the idea that God may have of you.