It does not matter whether you win or lose, what matters is whether I win or lose!

This is often the way it is in physics - our mistake is not that we take our theories too seriously, but that we do not take them seriously enough. It is always hard to realize that these numbers and equations we play with at our desks have something to do with the real world. Even worse, there often seems to be a general agreement that certain phenomena are just not fit subjects for respectable theoretical and experimental effort.

The universe is an enormous direct product of representations of symmetry groups.

My advice is to go for the messes - that's where the action is.

[Science] is corrosive of religious belief, and it's a good thing too.

Our mistake is not that we take our theories too seriously, but that we do not take them seriously enough.

The effort to understand the universe is one of the very few things that lifts human life a little above the level of farce, and gives it some of the grace of tragedy.