Do not lose your faith. A mighty fortress is our mathematics. Mathematics will rise to the challenge, as it always has.

Knowing what is big and what is small is more important than being able to solve partial differential equations.

Whatever is worth saying, can be stated in fifty words or less.

I am turned off when I see only formulas and symbols, and little text.

It is still an unending source of surprise for me how a few scribbles on a blackboard or on a piece of paper can change the course of human affairs.

Thoughts are steered in different ways.

The infinite we shall do right away. The finite may take a little longer.

The mathematicians know a great deal about very little and the physicists very little about a great deal.

It is most important in creative science not to give up. If you are an optimist you will be willing to "try" more than if you are a pessimist.

What exactly is mathematics? Many have tried but nobody has really succeeded in defining mathematics; it is always something else.

Mathematics may be a way of developing physically, that is anatomically, new connections in the brain.

Pride makes us artificial

Souvenez-vous toujours que dans la vie, la passion sans vision est une perte d’énergie, et que la vision sans passion est une impasse.

That night I woke up to a strange fact

It's much easier, after all, to learn mathematics from someone who's made a few mistakes. It's impossible to learn it from someone who always gets it right.

Resort is had to ridicule only when reason is against us.

The only problem with the "children of Reagan" line is it reminds you that Marco Rubio is the young candidate.

There was no club but the Hells Angels as far as I was concerned.

The reality is that zero defects in products plus zero pollution plus zero risk on the job is equivalent to maximum growth of government plus zero economic growth plus runaway inflation.

If the reason for climbing Mt. Everest is that it's hard to do, why does everyone go up the easy side?

The will is deaf and hears no heedful friends.