Jesus told his followers:

38 “You have heard that it was said, ‘An eye for an eye, and a tooth for a tooth.’ 39 But I tell you, don’t resist him who is evil; but whoever strikes you on your right cheek, turn to him the other also. 40 If anyone sues you to take away your coat, let him have your cloak also. 41 Whoever compels you to go one mile, go with him two. 42 Give to him who asks you, and don’t turn away him who desires to borrow from you."

Matthew 5:38-42 - World English Bible

In Matthew 5:33-37, Jesus addressed the disciple's relationship with God; one should take care in vows made to the divine. In this passage, he spoke to the followers' relationships with others; he addressed the law of reciprocity (Exodus 21:24, Leviticus 24:20, Deuteronomy 19:21). This law meant to limit the response of the aggrieved over an insult or injury he suffered. In this way, ever escalating feuds could be avoided and social order maintained. But, there was a problem with this law of reciprocity; who knew what measure of justice was equitable? The victim could go before the judge for a ruling, but could the injured party trust the fairness of the judge? The law was fine in principle but difficult in practice. How could one keep this duty from the Law?

Jesus proposed passivity as an answer. If the disciple does not resist evil, he has upheld the Law. The person who insults with a slap to the face, the thief, the imperial soldier who had the right under Roman law to compel a non-citizen into service for one mile, even the one who wants to borrow, all these people should not be resisted. For the Jewish Christian who still keep the Law, suffering was a means to uphold the duty of the Torah.

How do you react to the slights and insults you receive?