A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do.

生活是对灵魂的修炼。

学习数学的唯一方法就是做数学。

I'm very shy, believe it or not. I'm very different from the person you see on stage.

当今有效领导的关键在于影响力，而非权威。