The time of life is limited and unchangeable, so it is necessary to use every minute efficiently. Not using it well is a waste.

我深信遇见的每一个人都有他的意义。

The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.

在数学中，旅程和目的地同样重要，因为正是通过发现的过程，我们才能真正学习。