The best way to gain self-confidence is to do what you are afraid to do.

数学是一种超越文化和语言障碍的通用语言。

历史学家既是侦探，也是讲故事的人。

I never allow myself to have an opinion on anything that I don’t know the other side’s argument better than they do.

责怪小人为颠倒豪杰之士，而不知只有颠倒的人才是小人。可怜君子受世事折磨，而不知只有在折磨之中才能见到君子。