International politics is a ruthless and dangerous business, and it is foolish to expect states to behave according to moral principles.
国际政治是一项残酷而危险的业务，期望国家按照道德原则行事是愚蠢的。
If somebody offers you an amazing opportunity but you are not sure you can do it, say yes – then learn how to do it later!
预测未来的最好方法就是创造它。
我们需要创造性地思考如何解决世界上最大的问题。
把抑郁症患者当作只是感到悲伤来对待是没有意义的，说‘好了，坚持住，你会挺过去的。’悲伤或多或少像感冒——有耐心，它会过去。抑郁症就像癌症。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.