何谓镜也?自可认清白却不能自照。何谓衡也?自可量轻重却不能自权。何谓剑也?自可克锋刃却不能自击。何谓人也?责人易而责己难。有“至治之君”之称的唐太宗李世民言:“常怀克己之心,闭却是非之口。若能依朕所言,富贵功名可久。”本着君舟民水的治国理念,兼听他人谏言,克己之心,责己之行,最终成就了唐 What is the mirror? Since it can recognize innocent but not self-photo. What is the balance? Since the amount of measurable but can not be independent. What is the sword? Self-Ke Feng edge but can not self-styled. What is also a person responsible person responsible and easy to blame. There are “King of the rule of the rule,” said Li Shimin Tang Taizong words: "in the heart of self-denial, but the right and wrong of the mouth .If it can be said, the rich and famous for a long time. The idea of ​​running the country, and others to remonstrance, self-denial, self-serving trip, the ultimate achievement of the Tang