最重要的政治美德是节制，即能够以促进共同利益的方式平衡相互竞争的利益和价值观。
The most important political virtue is moderation, the ability to balance competing interests and values in a way that promotes the common good.
I want to be a tree, not because trees don't speak, but because trees don't lie.
Natural experiments are a powerful tool for understanding causal relationships in the real world.
We don’t inherit the ocean from our ancestors; we borrow it from our children.