《汉书·传·匡张孔马传》
家内实行礼节，在于地位卑贱的不超越地位尊贵的，晚辈不先于前辈人，逭也就是统揽人的情性、治理家室的道理。
礼之于内也。卑不逾尊，新不先故，所以统人情而理阴气也。
Observing the etiquette in the family will prevent a junior from overstepping a senior or someone of a lower status from surpassing someone of a higher status. This is the principle to regulate human nature and manage a family.