The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

做出伟大工作的唯一方法就是热爱你所做的事。

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 most courageous act is still to think for yourself. Aloud."

做你自己；其他人都已经有人做了。

世界是一场伟大的舞蹈，我们是其中的舞者。