The central problem of macroeconomics is to understand how people make decisions over time.
宏观经济学的核心问题是理解人们如何随时间做出决策。
最伟大的头脑既能成就最大的美德，也能犯下最大的恶行。
释义：运气不好的时候，即使是黄金也会失去光泽；运气好的时候，连普通的铁也会发光。
最伟大的实验始于一个简单的问题。
The more acute the experience, the less articulate its expression.
In science, we try to explain what we don't understand. In mathematics, we try to understand what we can't explain.
Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing.