耶穌藉著悔罪的聖洗，不單要「完成全義」(瑪竇福音 3:15)，祂亦以此來到罪人當中 ，把人的罪過扛在身上。祂接受約翰洗者象徵悔改的聖洗，顯示了祂對天父旨意的完全接納，也在祂與那些犯過罪卻渴望成義的人的共融中表現出來。祂被傅以天主聖神，是為在世上把救恩廣傳的使命作準備。
聖洗不是一小撮人的專利，而是為所有人的，因「天主是不看情面的，凡在各民族中，敬畏他而又履行正義的人，都是他所中悅的。」（宗徒大事錄 10:34-35) 藉著聖洗，天主授予我們能力把福音傳到地極，這就是我們的召叫。
Isaiah 42:1-4, 6-7
Thus says the LORD: Here is my servant whom I uphold, my chosen one with whom I am pleased, upon whom I have put my spirit; he shall bring forth justice to the nations, not crying out, not shouting, not making his voice heard in the street. a bruised reed he shall not break, and a smoldering wick he shall not quench, until he establishes justice on the earth; the coastlands will wait for his teaching.
I, the LORD, have called you for the victory of justice, I have grasped you by the hand; I formed you, and set you as a covenant of the people, a light for the nations, to open the eyes of the blind, to bring out prisoners from confinement, and from the dungeon, those who live in darkness.
Peter proceeded to speak to those gathered in the house of Cornelius, saying: “In truth, I see that God shows no partiality. Rather, in every nation whoever fears him and acts uprightly is acceptable to him. You know the word that he sent to the Israelites as he proclaimed peace through Jesus Christ, who is Lord of all, what has happened all over Judea, beginning in Galilee after the baptism that John preached, how God anointed Jesus of Nazareth with the Holy Spirit and power. He went about doing good and healing all those oppressed by the devil, for God was with him.”
Jesus came from Galilee to John at the Jordan to be baptized by him. John tried to prevent him, saying, “I need to be baptized by you, and yet you are coming to me?” Jesus said to him in reply, “Allow it now, for thus it is fitting for us to fulfill all righteousness.” Then he allowed him. After Jesus was baptized, he came up from the water and behold, the heavens were opened for him, and he saw the Spirit of God descending like a dove and coming upon him. And a voice came from the heavens, saying, “This is my beloved Son, with whom I am well pleased.”
The Baptism of the Lord reminds us how important Baptism is that we should not take lightly.
Besides trying to “fulfill all righteousness” (Matthew 3:15), through a baptism of repentance, Jesus also identified himself with every sinner, taking on our sins. His Yes to John's baptism of repentance is a Yes to the entire will of God, expressed in solidarity with men, who have incurred guilt but yearn for righteousness. By the anointment of the Holy Spirit, He prepared Himself for His mission on earth to bring salvation to all.
Likewise, through our baptism, the Holy Spirit comes upon us to anoint us. This anointment gives our life new meaning--a rebirth--and it prepares us for our new mission. It symbolizes a denial of our old self as we accept a new identity to be disciple of Christ. With this new identity, we have made a new commitment to a new calling.
Baptism is not for a selected privileged group, but for the whole world because “God shows no partiality, but in every nation any one who fears him and does what is right is acceptable to him.” (Acts 10:34-35) Through baptism, we are empowered to bring this Good News to the ends of the earth, and this is our new calling.
We should never be afraid to commit ourselves to this new mission as it is accompanied by the gifts of the Holy Spirit, which empower us to accomplish things we would never have imagined. And it is God's will for us to participate in His work of Salvation, which is evidenced by how Jesus ministered to His disciples through constant empowerment.
If Jesus who is without sin, places such importance on his Baptism, let us constantly remind ourselves to celebrate the gift of Baptism and joyfully carry out our responsibilities as disciples of Christ.