《汉书·传·董仲舒传》
可是夏代注重忠，殷代崇尚敬，周朝尊崇文的原因，是因为朝代更替时，前代有过失存在，为了补救，应当这样做。
然夏上忠，殷上敬，周上文者，所继之救，当用此也。
However, the reason why the Xia dynasty emphasized loyalty, the Yin dynasty respected reverence, and the Zhou dynasty revered literature, was because when the dynasties changed, the previous dynasty had made mistakes, and in order to remedy them, they had to do so.