领导力不是关于掌控，而是关于照顾你负责的人。

Stray birds of summer come to my window to sing and fly away. And yellow leaves of autumn, which have no songs,flutter and fall there with a sigh.

最紧密束缚我们的锁链是我们已经打破的那些。

The study of mathematics is a journey without an end.

The books that the world calls immoral are books that show the world its own shame.

优秀的数学家应该既严谨又富有想象力。