At Pentecost, Peter picks up his listeners by explaining what has happened (Acts 2:14-21).

It is important for him to say that everyone who calls on the name of the Lord will be saved. This Lord is Jesus, as he points out in verse 36.

Calling on Jesus in prayer is the hallmark of Christians (Acts 9:20-21). In Joel 3:5 quoted by Peter, Lord means God YHWH. Jesus is therefore God and Messiah. Today he sits at the right hand of God and through him we receive God’s Holy Spirit.

Even for David, Jesus is his Lord (verses 34-35). In the midst of our failures, we can turn to Jesus because the heavenly father has made him Lord and Messiah (Acts 2:36).