穷人并非不理性；他们和任何人一样理性，但他们在非常不同的约束下行动。
The poor are not irrational; they are just as rational as anyone else, but they operate under very different constraints.
领导力是激励他人实现他们认为不可能的事情。
复杂性和矛盾不是要解决的问题，而是有待探索的机会。
The United States is the most powerful country in the world, and it will remain so for the foreseeable future.
I don't want to be normal, I want to be extraordinary.
可持续性不是成本，而是对我们共同未来的投资。
盗贼是穷人最好的朋友。