The more you know who you are, and what you want, the less you let things upset you.

The world is changed by your example, not by your opinion.

In mathematics, you don't understand things. You just get used to them.

我们手里的金钱是保持自由的一种工具；我们所追求的金钱，则是使自己当奴隶的一种工具。

文学的美在于它让我们在一生中活出一千种人生。

好老师不是注满一桶水，而是点燃一把火。