"What is a person, if not the marks they leave behind?"
一个人，如果不是他们留下的痕迹，又是什么呢？
数学中最重要的技能是清晰思考的能力。
Nowadays people know the price of everything and the value of nothing.
It’s one thing to have a past, and another to be held hostage by it.
Health is not a privilege of the rich, but a vulnerability of the poor.
乐观是一种工具，你可以用它来实现你为自己设定的目标。