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.

The quality of a country's institutions is the single most important determinant of its long-term economic performance.

人性的弱点总是充满贪婪、恐惧或者是愚蠢，这是完全可以预测的，但是我们无法预测这种人性弱点的发生顺序。

写作是一种自由的行为，但也是一种责任。

挑战是伪装的机会——拥抱它们。