God is doing a multi-faceted work through Peter's first sermon that has ripple effects to us today. He is continuing the work and ministry of Jesus the Messiah, through the church and is accomplishing it in the same way He did through the Holy Spirit in Jesus' life and actions. God is further developing and equipping His people for the work of ministry. Today we are participants in receiving Jesus through faith as well as undergoing development and growth to become more like Him.