2A17 Is. 49:3, 5-6. Israel was first chosen to be God’s people and they alone, as the text says, “You are my servant, Israel, through whom I show my glory.” However, through Isaiah, God later expands the call to other peoples, telling Isaiah, “I will make you a light to the nations that my salvation may reach to the ends of the earth” and not just to the tribes of Jacob.
John 1:29-34. John presents Jesus as the sacrificial offering who will redeem us from our sins, when he says, “Behold, the lamb of God, who takes away the sins of the world.” John gives testimony that Jesus is the Son of God. Also he contrasts his baptism as being merely of water but Jesus’ baptism as being infinitely superior because he baptizes with the Holy Spirit.
1 Cor. 1:1-3. Paul addresses “the church of God that is in Corinth, to you who have been sanctified in Christ Jesus, called to be holy, with all those everywhere who call upon the name of our Lord Jesus Christ, their Lord and ours.” This is Paul’s way of saying that not just Jews but all people, who recognize Jesus as their Lord, are God’s people. We who belong to Jesus are made holy in him. The blessing at the end says that we as God’s people can bring God’s blessing to one another.