人类的状况是永恒的苦难。
The human condition is one of perpetual suffering.
Good research is like a good story—it has a beginning, a middle, and an end, and it holds together logically.
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。
宁可在田野中狩猎以求健康,也不花钱让医生开令人作呕的药。