《史记·三十世家·赵世家》
圣人观察乡俗而顺俗制宜，根据实际情况制定礼仪，这是为了利民富国。
圣人观乡而顺宜，因事而制礼，所以利其民而厚其国也。
Sages examine rustic customs and make rites in accordance, and based on the actual circumstances, these rites are set up, this is to benefit the people and make the country prosperous.