《史记·七十列传·刘敬叔孙通列传》
叔孙通善于看风使舵，度量事务，制定礼仪法规或取或舍，能够随着时世来变化，最终成了汉代儒家的宗师。 最正直的好似弯曲，事理本来就是曲折向前的 ，大概说的就是这类事情吧？
叔孙通希世度务，制礼进退，与时变化，卒为汉家儒宗。 大直若诎，道固委蛇 ，盖谓是乎？
Shusun Tong was good at observing the wind and changing his sail, judging the situation, and making decisions about whether to abandon or keep etiquette and rules, and he could change it according to the time. Ultimately, he became the Confucian sect master of the Han dynasty. Isn’t it true that the most upright seems to be twisted, and reason naturally twists and turns forward? This is probably talking about this kind of thing.