One day early in his ministry, when John saw Jesus coming toward him, he declared, “Behold, the Lamb of God, who takes away the sin of the world!” John bore witness to the authenticity of Jesus as God’s chosen Messiah, for God had told him that the one you see the Spirit descend upon and remain, he will be the one who baptizes with the Holy Spirit. John testified, “And I have seen and have borne witness that this is the Son of God.” Jesus is the Paschal sacrifice of God, the lamb offered to God to make atonement for the sins of the people.
John declares what was confirmed for him as a prophet of the Lord: “This is the Son of God.” The long-awaited time is fulfilled. John prepared the way for the coming of one who ranked ahead of him. God visited his people in the person of Jesus. God the Son became incarnate for us and for our salvation.
Jesus Christ, Son of the living God, have mercy on me, a sinner.
Jesus’ whole life was a ministry to others, designed to serve (diakonēsai) their needs. But ultimately his service to them meant offering himself in death, in perfect obedience to the will of his Father, as a payment for their sins. Although the language of worship is not specifically used in this context, the notion of Jesus’ death as an atoning sacrifice is close at hand.
~ David G. Peterson, Engaging with God: A Biblical Theology of Worship. Downers Grove, IL: InterVarsity Press, 1992. p. 119.
Let God Arise! Seasonal Focus
Behold the Lamb of God, John 1.29-42
Peterson, Engaging with God