The liberal international order is a myth.

Leadership is about leaving a legacy, not just a balance sheet.

The power of abstraction allows us to see the common threads that run through seemingly disparate problems.

学习数学的最好方法就是去做数学。

过去总是在现在中存在。

我们最害怕的变化可能包含我们的救赎。

数学是理性的音乐。