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.

我唯一感兴趣的是人类这种动物以及它的样子。

"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."

Do not try to change the outer world; change your inner world, and the outer world will adjust itself.

解释：要紧紧抓住时机不能错过，错过了也不能延误太久。