《史记·八书·礼书》
城郊百姓不须聚集起来守城，城外也不须挖掘防守用的护城河，不须建立坚固的阨塞要地，不用兵机谋略，而国家平安，不畏外敌，坚固异常。没有其他原因，只不过是懂得礼义之道并且能公平地处理人际关系，役使有时，并且推诚相爱。所以，百姓听命，如影附形，如响附声。
城郭不集，沟池不掘，固塞不树，机变不张，然而国晏然不畏外而固者，无他故焉，明道而均分之，时使而诚爱之，则下应之如景响。
The people in the suburbs do not need to gather to defend the city, there is no need to dig a moat for defense outside the city, and there is no need to build a fortified pass. No military strategy is needed, and the country is peaceful, fearless of foreign enemies, and extremely strong. There is no other reason, just knowing the way of etiquette and righteousness and being able to deal with interpersonal relationships fairly, using people sometimes, and loving each other sincerely. Therefore, the people obey, like a shadow attached to a form, like an echo attached to a sound.