You don't have to be perfect to be a good baker.

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

To write is to breathe, to live, to exist.

数学的力量在于它的抽象性，使我们能够看到不立即显现的模式和联系。

The soul is a fire that darts its rays through all the senses; it is in this fire that existence consists.

宁可让儿童一个字也不识，也不要使他为了学到这一些学问而把其他有用的东西都牺牲了。