Pope John Paul and Kerygma of the Apostolic Church
Here's an excellent quote from St John Paul II on the kerygma:
“By raising Jesus from the dead, God has conquered death, and in Jesus he has definitely inaugurated his kingdom. During his earthly life, Jesus was the Prophet of the kingdom; after his passion, resurrection and ascension into heaven he shares in God’s power and in his dominion over the world (cf. Mt 28:18; Acts 2:36; Eph 1:18-21). The resurrection gives a universal scope to Christ’s message, his actions and whole mission. The disciples recognize that the kingdom is already present in the person of Jesus and is slowly being established within man and the world through a mysterious connection with him.
Indeed, after the resurrection, the disciples preach the kingdom by proclaiming Jesus crucified and risen from the dead. In Samaria, Philip “preached good news about the kingdom of God and the name of Jesus Christ” (Acts 8:12). In Rome, we find Paul “preaching the kingdom of God and teaching about the Lord Jesus Christ’’ (Acts 28:31). The first Christians also proclaim “the kingdom of Christ and of God” (Eph 5:5; cf. Rev 11:15; 12:10), or “the kingdom of our Lord and Savior Jesus Christ” (2 Pt 1:11). The preaching of the early Church was centered on the proclamation of Jesus Christ, with whom the kingdom was identified. Now, as then, there is a need to unite the proclamation of the kingdom of God (the content of Jesus’ own “kerygma”) and the proclamation of the Christ-event (the “kerygma” of the apostles). The two proclamations are complementary; each throws light on the other.”