只知道自己的一面的人对那面了解甚微。

阅读的习惯是唯一没有掺杂任何杂质的享受；当所有其他乐趣消失时，它依然存在。

The best way to learn is by doing, not just by listening or reading.

领导力是关于做出艰难的决定并坚持到底。

【译文】下等君主用自己能力，中等君主用他人劳力，上等君主用他人智慧。

The motor of our ingenuity is the question ‘Does it have to be like this?’, from which arise political reforms, scientific developments, improved relationships, better books.