理解劳动力市场的最佳方式是观察现实数据，而不仅仅是理论模型。
The best way to understand labor markets is to look at real-world data, not just theoretical models.
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
保持饥饿，保持愚蠢
Every day is a new opportunity. You can build on yesterday's success or put its failures behind and start over again.