Success is not final, failure is not fatal: It is the courage to continue that counts.

领导力意味着今天做出艰难的决定，为未来的几代人带来好处。

Happiness is not something ready made. It comes from your own actions.

"The most dangerous stories are those that are true."

"I always believe if you’re stuck in a hole and maybe things aren’t going well you will come out stronger."

数学的本质在于它的自由。