牺牲自由以换取安全（可指生活保障）的人，不配有自由和安全。
出自《海国图志序》。善于学习外国的长处，就能够征服外国;不善于学习外国的长处就会被外国所征服。
过去是一个装满光的橱柜，你只需要找到打开门的钥匙。
What I remember above all about Harvard was being in the midst of so much energy and intelligence. It could be exhilarating, intimidating, sometimes even discouraging, but always challenging. It was an amazing privilege…and though I left early, I was transformed by my years at Harvard, the friendships I made, and the ideas I worked on.
The purpose of statistical methods is to provide a rational basis for drawing conclusions from data.
统计方法的目的是为从数据中得出结论提供合理的基础。
Collaboration is the key to solving the world's most pressing problems.
The power of mathematics is in its abstraction, allowing us to see patterns and connections that are not immediately obvious.