The style of life is a unity because it has grown out of the difficulties of early life and out of the striving for a goal.

We only regard those unions as real examples of love and real marriages in which a fixed and unalterable decision has been taken. If men or women contemplate an escape, they do not collect all their powers for the task. In none of the serious and important tasks of life do we arrange such a "getaway." We cannot love and be limited.

The mathematical life of a mathematician is short. Work rarely improves after the age of twenty-five or thirty. If little has been accomplished by then, little will ever be accomplished.

Every pampered child becomes a hated child.... There is no greater evil than the pampering of children.

Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.

There is only one reason for an individual to side-step to the useless side : the fear of a defeat on the useful side.

It is from among such individuals that all human failures spring.