Jesus Christ has finally made an appearance in Matthew’s narrative as an adult, right after John the Baptist has called to account the Pharisees and Sadducees. The first words that Matthew records Jesus saying to John the Baptist are going to be an indicator of what Matthew’s themes for the gospel are going to be going forward.
Matthew 3 : 13 – 4 : 1
Then Jesus came from Galilee to the Jordan to be baptized by John. But John tried to deter him, saying, “I need to be baptized by you, and do you come to me?” Jesus replied, “Let it be so now; it is proper for us to do this to fulfill all righteousness.” Then John consented.
As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and lighting on him. And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.”
Then Jesus was led by the Spirit into the desert to be tempted by the devil.
New International Version, 1984 Edition