If you're not stubborn， you'll give up on experiments too soon. And if you're not flexible， you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

在危机时刻，真正的领导者会把人民置于利润之前而脱颖而出。

我不害怕脆弱。

The most successful modern states are those that have been able to harness the power of the market while maintaining a strong state that can provide public goods and regulate private activity.

70岁，我才刚刚开始。等着瞧吧。

相关性和因果关系之间的区别在实证工作中是根本性的。