The real and effectual discipline which is exercised over a workman is that of his customers.

The only limit to our realization of tomorrow will be our doubts of today.

Hard work beats talent when talent doesn't work hard.

数学不仅仅是人类的发明；它具有一种独立于我们而存在的深刻现实。

数学的本质在于它的自由。

"Reading is the most powerful tool we have."