The final three verses of Matthew 4 summarize the first part of the ministry of Jesus in the region of Galilee. This summary is for a lengthy period of time, and is covered in detail in the coming chapters of Matthew.
The ministry of Jesus is described and summarized in this brief passage, giving us some insights into the ministry strategy of Jesus as he seeks to serve people in this region. Matthew gives us the three main thrusts of Jesus ministry, after calling many to follow him: teaching, preaching, and healing.
Teaching
First, Matthew tells us that Jesus spends time teaching in the synagogues. The synagogue was the Jewish place of worship, where the Jews met every Sabbath. Such a location was an ideal place for Jesus to spend time teaching, since it was a gathering place for the Jewish people.
Typically, a service would include some reading from the Old Testament. After this, the local leader, or rabbi, would speak. As a rabbi, Jesus would have received the invitation to speak in settings such as this, providing the perfect opportunity to use Old Testament Scripture to point to the reality of a new kingdom coming.