You have heard that it was said, 'An eye for an eye and a tooth for a tooth.' But I say to you, Do not resist the one who is evil. But if anyone slaps you on the right cheek, turn to him the other also. meaning
Meaning, be the bigger man/the adult in negative situations. Stand tall and strong rather than stubborn and brash. It's better to move on instead of stirring up an unnecessary confrontation.