The statesman， who should attempt to direct private people in what manner they ought to employ their capitals， would not only load himself with a most unnecessary attention but assume an authority which could safely be trusted， not only to no single person， but to no council or senate whatever， and which would nowhere be so dangerous as in the hands of a man who had folly and presumption enough to fancy himself fit to exercise it.

书籍就像一面镜子。如果一头驴子往里看，你不能指望一个天使会往外看。

The beauty of a mathematical idea is that it can be shared and understood across cultures and time.