《管子·君臣上》
所以，区别上下关系，规正君臣职分，叫作 理 ；顺理而行，没有错误，叫作 道 。道德规范一确定，人民就有轨道可循了。
是故别交正分之谓理，顺理而不失之谓道，道德定而民有轨矣。
Therefore, to distinguish between upper and lower relationships and to regulate the duties of ministers and subjects is called "reason"; to act in accordance with reason and without error is called "the way." Once the moral norms are established, the people will have a track to follow.