The strength of a nation's institutions is not just in their formal rules, but in the informal norms that govern behavior and the degree to which they are internalized by the population.

应该做官就做官，应该辞职就辞职，应该继续干就继续干，应该马上走就马上走。

人类进化的故事远未结束。

The poor are not irrational; they are just as rational as anyone else, but they operate under very different constraints.

The best time to plant a tree was 20 years ago. The second best time is now.

我拍电影不是为了给出答案，而是为了提出问题。