The Baptism of the LORD (GA)

John 1:29-34
29 The next day he saw Jesus coming toward him, and said, “Behold, the Lamb of God, who takes away the sin of the world! 30 This is he of whom I said, ‘After me comes a man who ranks before me, because he was before me.’ 31 I myself did not know him, but for this purpose I came baptizing with water, that he might be revealed to Israel.” 32 And John bore witness: “I saw the Spirit descend from heaven like a dove, and it remained on him. 33 I myself did not know him, but he who sent me to baptize with water said to me, ‘He on whom you see the Spirit descend and remain, this is he who baptizes with the Holy Spirit.’ 34 And I have seen and have borne witness that this is the Son of God.”
The Holy Bible : English standard version. 2001 (Jn 1:29-34). Wheaton: Standard Bible Society.

John the Baptizer has seen and he bears witness to the Lamb of God. He has seen the Spirit descend on Jesus. He knows that Jesus will baptize with the Holy Spirit. John the Baptizer does not keep this news to himself. He speaks faithfully to his disciples that this is the reason he baptizes with water. John will later say, "He must increase, but I must decrease."

John is not the Holy One of Israel, but he points to him. John is not the Lamb or the Good Shepherd but he points to him. John the Baptizer is just one of us lowly humans born of Elizabeth. But Jesus is the Great I AM. Jesus is the one who has come down out of heaven. He is the only son of the Father who has come into the flesh. He is the Light of the World. He is the Eternal Word of God. He does not come into the world to condemn it. He comes to the world to save it.

What great news John the Baptizer has given to the people of Judea. They may not have seen the Dove descend out of Heaven and remain upon Jesus but John tells them it happened. They may not know that he is the Eternal God dwelling in the flesh, but John tells them. These Judeans may not even be there some years later when Jesus is crucified for the forgiveness of their sins, but John tells them, "He will take away the sins of the World." This is the Great Passover Lamb. Blessed are those who have not seen and yet still believe (Because you have been told).