利己
7.It is hard to say that such a change -- indeed a double-edged sword -- is wise.
8.Smith is saying that participants in the economy are motivated by self-interest and that the “invisible hand” of the marketplace guides this self-interest into promoting general economic well-being.
9.The good are never alone, and the kindhearted are the merriest. Those who help others and so benefit themselves are the happiest.


