读“五代”史,有位冯道先生,一生侍候过五个朝代(后梁,后唐,后晋,后汉,后周)的十一位皇帝。皆能稳做宰相,三师等高官而不倒,堪称“奇才”。这位“人莫测其喜愠”的老兄,在春风得意之余,总结四句咏古诗:“口是福之门。舌是斩身刀,闭口深藏舌,安身处处牢”(《全唐诗外编》)可谓他为人处世的准则。有一次,晋高祖石敬 Reading “Five Dynasties” history, there is a Mr. Feng Tao, served throughout the five Dynasties (Beiliang, Hou Tang, Hou Jin, Han, Hou Zhou) eleven emperors. Are stable prime minister, three divisions and other senior officials do not fall, called “Wizards ”. The man, who is in doubt of his joy, is proud of the spring, summarizing four verses: “The mouth is the door of blessing. The tongue is a cut-off knife, (”Full Tang poems") can be described as his guide to life. Once, Jin Gao Zu Shijing