John the Baptist "saw": "saw Jesus coming", "I saw the Spirit come down, like a dove from heaven and remain on him" and "I saw and bear witness: this is the Son of God". The verb to see indicates the condition of those who have gained knowledge of the reality to which it refers. Before, John had little knowledge of Jesus because he lacked experience with the Savior. With this text, it can be seen that John went through a process of approximation, seeking knowledge of Jesus to the point of presenting Him with conviction. When he sees Jesus approaching, he manifests his knowledge of the One who comes with a specific and special mission, the One who is the WORD of which a voice was made in the desert. When he affirms that he saw the Spirit descending on Jesus, he indicates his knowledge, revealed by God, about the One who comes with the Strength of God, with the Power of Heaven, the Spirit that always accompanies Him. And finally, in saying that he saw and bears witness, he concludes by affirming with full certainty the reality of Jesus who is not only a Lamb, but especially a Son of God.
2. John points to Jesus as the Lamb of God, not just any lamb, but the one who takes away the sins of the world. Here it is already clear that John the Baptist is not the Savior, he did not come to save. Pointing out the Savior is his mission, because for this he came into the world. His disciples must now follow the True Master, the Savior and liberator of humanity. John is aware that Jesus precedes him and is in front of him, because He was, is and always will be. John's condition is that of a servant, as must be the way of life of all the disciples, since being SERVO is also and, especially, the way of being of Jesus himself. As every vocation is Christological, that is, turned towards Christ, meaning that the condition of Christ must be the same for all his followers.
3. Jesus is the true, unique and last Lamb. He performs the perfect sacrifice, being the perfect and obedient victim, and also the One who holds the perfect priesthood. There will not be another lamb, another sacrifice and another priest. He is the fullness of all these realities of promise. Therefore, as the fullness of sacrifice, the victim and the priesthood, He is the absolute Redeemer. He is, still, the Servant par excellence, and even more, the Light of the nations.
4. The mystery of the Person of Jesus can only be seen through the action of the Holy Spirit. John will know Jesus when he sees the Spirit of God on him: "I saw the Spirit come down, like a dove from heaven, and remain on him" (32). When Mary visited Isabel, the same Holy Spirit allowed John, in the old woman's womb, to jump for joy, to rejoice in the presence of the Lord. From an early age, the Spirit prepared John the Baptist for the great mystery that he was to reveal to the Jews. The Spirit confirms to John the One who must be introduced to his disciples and to all who are baptized in the water and reveals Him as the Son of God. At the same time it reveals the new baptism, which will be carried out with fire, but not any fire, but the FIRE of the Holy Spirit, that is, the Spirit itself.
5. Water and Spirit baptism is the one that generates humanity for God. The Father, through his Son, gives the Holy Spirit, who erases original sin, makes the baptized a participant in the divine nature, makes him a son in the Son, introduces him into the Body of Christ and grants him the evangelizing mission. Among all these data, membership stands out. We were created to be children in the Son, partakers of God's nature. This vocation is only possible thanks to the action of the Father, by the Son, in the Holy Spirit, that is, by the action of the Holy Trinity present at the moment of Jesus' baptism.