The arithmetic of algebraic groups is a central theme in the Langlands program.

A good world needs knowledge， kindliness， and courage； it does not need a regretful hankering after the past or a fettering of the free intelligence by the words uttered long ago by ignorant men.

The theatre is the most immediate way in which a human being can share with another the sense of what it is to be a human being.

我不怕死，我只是不想在我死的时候在场。