《汉书·传·董仲舒传》
舜仅仅改变了历法，改换了车马、祭牲、服装的颜色，来顺承天命罢了，其他完全遵循尧的治国之道，为什么要改变呢！
改正朔，易服色，以顺天命而已；其余尽循尧道，何更为哉！
Shun only changed the calendar, changed the carts and horses, sacrificial animals, and the colours of clothing, to follow the Mandate of Heaven, for everything else he completely followed Yao's way of governing the country, why should he change?