The risen Lord Jesus taught His disciples “that the Christ should suffer and on the third day rise from the dead” and “that repentance for the forgiveness of sins should be proclaimed in his name to all nations” (Luke 24:46–47). Therefore, St. Peter preaches repentance and forgiveness to the people of Jerusalem. As he proclaims that Jesus fulfilled all that “God foretold by the mouth of all the prophets” (Acts 3:18), he also convicts the people of their sin, because they “delivered over and denied” this Lord Jesus and “killed the Author of life.” Yet God “glorified his servant Jesus” and raised Him from the dead (Acts 3:13–15).