《汉书·志·天文志》
人伦常纲中仁、义、礼、智、信以信为最重要。五事十貌、言、听、视、心，以心为首，所以其他四星失常，土星就为之所动。
仁义礼智以信为主，貌言视听以心为正，故四星皆失，填星乃为之动。
Among the five human relations, benevolence, righteousness, courtesy, wisdom and faith, faith is the most important. In the five matters, appearance, speech, hearing, vision and thinking, thinking is in the first place. Therefore, when the other four stars are abnormal, Saturn will be affected.