If you don't like it, go somewhere else, to another universe where the rules are simpler.

I am going to tell you what nature behaves like. If you will simply admit that maybe she does behave like this, you will find her a delightful, entrancing thing. Do not keep saying to yourself, if you can possibly avoid it, 'But how can it be like that?' ...Nobody knows how it can be like that.

Mathematics is not just a language. Mathematics is a language plus reasoning.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

Of course, you only live one life, and you make all your mistakes, and learn what not to do, and that's the end of you.

Maybe that is why young people make success. They don't know enough.

Computer science is not as old as physics; it lags by a couple of hundred years. However, this does not mean that there is significantly less on the computer scientist's plate than on the physicist's: younger it may be, but it has had a far more intense upbringing!