One long verse. Why is this verse placed here, and what is its purpose?
It states that Jesus goes to Capernaum. Why Capernaum? This is the town which became His headquarters. He was alienated from His hometown of Nazareth. They did not believe in Him. A prophet is without honor in his hometown. Matthew would be called to become a disciple there. It was a major trade route and a very important city. A Roman garrison was stationed here. From this city, Jesus goes on to Jerusalem. John spends time on Jesus’ ministry in Jerusalem. Note http://ref.ly/Mt4.12.
Remember John’s gospel deals with Jesus’ ministry. Therefore he gives details of Jesus’ ministry that may not be mentioned in the other gospels.