After Jesus heard about His cousin John the Baptist, being thrown into prison for telling the truth about Herod the Tetrarch’s sins, He came into the area beside the Sea of Galilee.
There He preached powerfully about God’s wonderful coming Kingdom of God on this Earth, as had been prophesied by the prophets of God for 4,000 years. (Jude 1:14-15, Daniel 7:18 Daniel 7:27)
Jesus told people they needed to repent of their sins and turn to loving God and living by God’s Commandments and laws of how to live. (Mark 1:14-15, Matthew 19:17)