I am more interested in what can be done with the knowledge than in the knowledge itself.
后见之明对历史学家乃至回忆录作者非常有用,但遗憾的是,实践中的政治家却无法拥有。
Happiness is a state of mind. It's just according to the way you look at things.
走出去不是目的,走进去才是成功。
A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.