Thus, be it understood, to demonstrate a theorem, it is neither necessary nor even advantageous to know what it means.

Point set topology is a disease from which the human race will soon recover.

It is by logic that we prove, but by intuition that we discover. To know how to criticize is good, to know how to create is better.

There are no solved problems; there are only problems that are more or less solved.

The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.

Doubt everything or believe everything: these are two equally convenient strategies. With either we dispense with the need for reflection.

If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living

It is through science that we prove, but through intuition that we discover.

Geometry is the art of correct reasoning from incorrectly drawn figures.

One geometry cannot be more true than another; it can only be more convenient.

It is far better to foresee even without certainty than not to foresee at all.

Resolution demands a sacrifice.

Rejecting the miracles of Christ, we still have the miracle of Christ Himself.

Those that want friends to open themselves unto are cannibals of their own hearts.

If I could have any job I would be a cat... but that's not something I'm supposed to talk about in public.

Love is bigger than government.

I learned early that if I wanted to achieve anything in life, I'd have to do it myself. I learned that I had to be accountable.

I expect if you're a professional public speaker, you probably wouldn't want to go onstage and sing and play drums.

I don't like that word [memoir]. Whenever my publishers have wanted to use it, I've told them to take it away.

International rock star - gravy maker extraordinaire.

It's natural to sit down but the human spirit within us can make us get up.