Ada came from Lwów. She was a very good looking girl who was studying mathematics at the University of Geneva. For a few years I had an off-and-on romance with her.

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.

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

I have been seized by the power of a great affection.

Sometimes when you dig deep into the past, you shed uncontrollable tears.

Motherhood is a Sisyphean task. You finish sewing one seam shut, and another rips open. I have come to believe that this life I'm wearing will never really fit.

Those emotive theorists who said that the function of moral utterance was to evince emotion would... have been correct if they had substituted the indefinite for the definite article.

That is love, to give away everything, to sacrifice everything, without the slightest desire to get anything in return.3

I've been very lucky. I've had my problems in the past, I've had my troubles, but you move on. I had a great life and I am really thankful for it.

5 opens with the promise of a number of substantial direct private investments that can swiftly transform the economy and set all sectors on a pronounced upward curve.

There is magic in the memory of schoolboy friendships; it softens the heart, and even affects the nervous system of those who have no heart.

It is well known that apes in the wild offer spontaneous assistance to each other, defending against leopards, say, or consoling distressed companions with tender embraces.

What the teacher is, is more important than what he teaches.