And Jesus went about all Galilee, teaching in their synagogues, preaching the gospel of the kingdom, and healing all kinds of sickness and all kinds of disease among the people. (Matthew 4:23, NKJV)
It is quite disheartening to hear gospel preachers teach that Jesus was teaching the Law of Moses to the Jews while He was on the earth. They say this, it seems, to prop up their own false teaching about marriage, divorce and remarriage. They say we cannot use Matthew 5 and 19 to know about divorce and remarriage today, because He was teaching Jews how to be good Jews under the Law. But, Jesus was preaching “the gospel of the kingdom” – no plainer, simpler words could describe the content of Christ’s teaching. His sermon on the mount (Matthew 5-7) was the gospel of the kingdom, not a rehearsal of how to keep the Law of Moses. Jesus came to fulfill the law and the prophets (which He did, Matt. 5:17-18; Lk. 24:44-47; Rom. 10:4), not to preach it. The miracles of Jesus did not confirm the validity of the Law of Moses, they confirmed the validity of the gospel Jesus preached. They showed Him to the be Son of God, not the defender of Moses (John 20:30-31). We may – and must – go to what Jesus taught while He was on earth, as well as what His apostles taught after He ascended, to learn His will on “all things that pertain to life and godliness” – including the subject of marriage, divorce and remarriage.