Complex sentence: A major component of the Christology of the Apostolic Age was that of Saint Paul, whose central themes were the notion of the pre-existence of Christ and the worship of Christ as "Kyrios" (Greek: "Lord").
Split into simpler sentences: A major component of the Christology of the Apostolic Age was that of Saint Paul. His central themes were the notion of the pre-existence of Christ and the worship of Christ as "Kyrios" (Greek: "Lord").