This is the beginning of the gospel of Jesus Christ, the Son of God. As it is written in the prophet Isaiah, "See! I am sending my messenger ahead of you, who will prepare your way. He is a voice calling out in the wilderness: 'Prepare the way for the Lord! Make his paths straight!'"
John was baptizing in the wilderness, proclaiming a baptism of repentance for the forgiveness of sins. People from the whole Judean countryside and all the people of Jerusalem were flocking to him, being baptized by him while they confessed their sins.