"The line between hero and villain is often thinner than we think."

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

The tigers of wrath are wiser than the horses of instruction.

"Silence can be the most powerful form of communication."

We cannot underestimate the importance of engaging local communities in energy projects.

To be free is not to have the power to do anything you want, but to have the power to do what is right.

No man or woman is worth your tears， and the one who is， won‘t make you cry。

"The power of literature lies in its ability to make us see the world differently."

最好的故事来自提出困难的问题，而不是提供简单的答案。