投资的关键是拥有安全边际。
The key to investing is to have a margin of safety.
A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.
可持续发展不再是可选项，而是任何希望在未来蓬勃发展的企业的必需品。
网球是一项心理游戏。每个人都健康，每个人都打出很棒的正手和反手——重要的是头脑。
The writer must be a smuggler of truths, a clandestine agent of freedom.