Jesus, Son of God
In these two sections Luke proves the Messiah-ship of Jesus. First, God speaks at his baptism and calls Jesus his son. Second, Jesus' genealogy is traced all the way back to Adam, the father of all people.
It is at first sight puzzling that Jesus should have accepted baptism at the hands of John, for this baptism was ‘a baptism of repentance’ (3). Since Luke depicts Jesus as without sin it is not obvious why he should have undergone this baptism. But Jesus saw sinners flocking to John’s baptism. Clearly he decided to take his place with them. At the outset of his ministry he publicly identified himself with the sinners he came to save.
1. God himself says that Jesus is his son.
2. As the son of Adam, Jesus is related to all people.
Several features of Luke’s genealogy distinguish it organizationally from the lineage in Matthew 1:1–17. (1) Luke’s placement of the list between the baptism and temptations makes the sonship of Jesus the issue, since that is the point of both the baptism and the temptation accounts. Can he be the Son? (2) Because it goes in reverse order, Luke’s list allows Adam’s name to be the last human echo before the temptations of Jesus are described. (3) Where Matthew stops with Abraham, highlighting Jewish interest in Israel’s founder, Luke goes back to the birth of humanity by God’s creative hand. Thus he shows that Jesus’ story is humanity’s story.
His roots extend to David, Abraham and Adam. God has carefully designed his plan. There are no historical surprises in Jesus. Ultimately all humanity is a unit, and Jesus is concerned with more than deliverance of the tiny, elect nation of Israel. With him comes realization of the Old Testament hope for that nation, but bound up in him also is the fate of all people.
In Greek culture a tracing of such roots would be done to show Jesus’ qualifications for his task (Diogenes Laertius Life of Plato 3.1–2; Plutarch Parallel Lives, Alexander 2.1; L. T. Johnson 1991:72). The fact Jesus is God’s Son would be particularly significant here, even though that sonship in this context is mediated through Adam. What Luke implies here is explicit in Paul, where Jesus is the second representative of humankind, the second Adam (Rom 5:12–21; 1 Cor 15:20–28, 45–49).