一本书本身就是一个世界，一个在我们眼前展开的宇宙。

社会制度应该建立在个人自由和财产权的基础上，这是繁荣和稳定的关键。

The truth is rarely pure and never simple.

"In the silence between words, the truth often resides."

It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change.

The value of any mental activity is measured by its contribution to successful living.

可以说，消化道是生命物质最初和最古老的实验室。

教育是对人力资本的投资，会以更高生产率的形式获得回报。