死者虽不可见，但他们并未缺席。
The dead are invisible, but they are not absent.
英明君主的治国之道，必须明确公与私的界限。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
The theory of computation is not just about solving problems, but also about understanding the limits of what can be computed.
意志不坚强的，智慧一定不高；说话不讲信用的，行动也不会果敢；拥有财富而不肯分给人的，不值得和他交友；守道不坚定，阅历事物不广博，辨别是非不清楚的，也不值得和他交游。
