On Pentecost Peter explains how Jesus of Nazareth—attested by God, crucified by men, and raised by God—fulfills Old Testament promises from the Psalms and the Davidic covenant. He proclaims Jesus as Lord and Christ, offers the gift of the Holy Spirit, and calls the crowd to repent and be baptized.

The sermon clarifies that true repentance is more than sorrow: it is confession, a change of direction, and turning to Christ. Salvation is by grace through faith, bringing hope and a lifelong call to repent and follow Jesus.