《周书·列传·卷十一》
遵循礼制就是遵循正理，容易成就辅佐帝王的功绩；违反常道就是不合常规，难以建立匡扶时世的大业。
率礼由乎正理，易以成佐世之功；反经系乎非常，难以定匡时之业。
Following the etiquette is to follow the right principles, which makes it easy to achieve the merits of assisting the emperor; Violating common sense is unconventional and it is difficult to establish a great cause of correcting the times.