What difference does it make for our understanding of NT Christology that the κύριος (“Lord”) language from the OT, the translation of YHWH, is applied to Jesus in the New?
It is highly significant. It wraps up Jesus into the identity of YHWH. And it tells us nothing about whether the NT writers thought Jesus was “divine” in the sense of either pre-existent or sharer in the godhead in a binitarian or proto-Trinitarian sort of fashion.
To take one example: in Peter’s sermon at Pentecost in Acts 2,
he both cites Joel 2 which refers to being saved by calling on the name of YHWH and also then refers to Jesus as the Lord upon whose name one must call in order to be saved. Is Luke’s point, in part, that Jesus is YHWH?
Three points argue heavily against this.
First, the sermon itself consistently and sharply distinguishes between Jesus and God. “Jesus of Nazareth, a man attested to you by God with mighty works and wonders and signs that God did through him.” Jesus is a human who acts as God’s agent on the earth. This is God’s doing, bringing about the signs and wonders promised by Joel–but through a human agent.
Similarly, when speaking of the resurrection this sermon (like Paul, Hebrews, etc.) speaks of God as the agent of the man Jesus’ resurrection: “This Jesus God raised up… having received the Spirit from the Father, he has poured this out…” The sermon indicates that Jesus is a human through whom God is acting.
Second, the sermon indicates clearly that becoming Lord (κύριος) is something that happens to Jesus at his resurrection: “Let the house of Israel therefore know for certain that God has made him both Lord and Christ, this Jesus whom you crucified.” The claim of the entire sermon is that Jesus’ being Lord (κύριος) is a change that takes place in Jesus, not something that was always true or is simply shown to be true at the resurrection. Again, Luke is in step with Paul here (see Romans 1:4, 1 Cor 15).
Third, the OT has several perfectly good categories for YHWH’s name being placed on people or places. The story of the biblical God is the story of a God who wraps his identity up with those who represent Him on the earth. One example is found in Daniel 9. In the prophet’s prayer for restoration from exile, this is the means by which he strives to motivate God to act: “O Lord, hear; O Lord, forgive. O Lord, pay attention and act. Delay not, for your own sake, O my God, because your city and your people are called by your name.”
God has placed his name on a people. God has placed his name on a city. This means that YHWH’s fate on the earth, YHWH’s standing before the nations, is tied to what happens to those humans and that geopolitical entity to which YHWH has chosen to bind himself.
What does this mean for Jesus? It means that a major set of data in the NT that speaks to the question of Christology should be reframing how we think about what it means to be the human(s) entrusted to represent the reign of God to the earth. It means that the NT writers are inviting us to see that Jesus is the man upon whom God has placed his name and staked his identity, as he did to the kings, people, and nation of old.
It means to be called “Christian” is to bear the name of the name-bearer, and therefore to be charged to carry the mission of God, as God’s ambassador, to the ends of the earth.






