God the Holy Spirit is powerfully at work in the hearts of God’s people to help them live as kingdom citizens. When I hear of what Christ has done and realize that he is the fulfillment of law, I am encouraged to obey Jesus and to aim for the perfect standard of righteousness that he reveals to me in his teaching.
In particular, the Spirit helps me to think carefully about the words that I speak and to make a diligent effort to keep my promises.
33 “Again you have heard that it was said to those of old, ‘You shall not swear falsely, but shall perform to the Lord what you have sworn.’