Economics is at its best when it helps us solve real-world problems in a rigorous and transparent way.

现代化学家不满足于仅仅成为化合物的制造者；他必须是自然的解释者。

The wild doesn’t give you second chances. You have to make every moment count.

我们知晓过去但无法控制它，我们掌控未来但无法知晓它。