J esus teaches a high standard of righteousness, requiring sincerity in the heart. In startling words, he warns us against anger, adultery, oaths and vengeance.
True righteousness is internal.
In chapter six, Jesus illustrates this point by denouncing religion done for show. If you do, you will have no reward from your Father in heaven. So when you give to the needy, do not announce it with trumpets, as the hypocrites do in the synagogues and on the streets, to be honored by men. In Jesus' day, some people made a show of religion. They made sure that people could see them doing good.