文/唐.李世民(599~649)夫以銅為鏡,可以正衣冠;以古為鏡,可以知興替;以人為鏡,可以明得失。朕常保此三鏡,以防己過。──選自《貞觀政要》Employing Able MenLi Shimin (599 - 649)English translation: Hsin-Yu HuangWith a bronze mirror,one can tuck up his attire;With the past as a mirror,one can know the rise and fall of dynasties;With other people as mirrors,one can understand loss and gain.I, the emperor, constantly keepthese three mirrors to avoid faults.── from Zhenguan Zhengyao(Essentials of Government in the Zhenguang Period)