The "good news" of God's mercy and love revealed in the life, death, and resurrection of Christ. It is this Gospel or good news that the Apostles, and the Church following them, are to proclaim to the entire world (571, 1946). The Gospel is handed on in the apostolic tradition of the Church as the source of all-saving truth and moral discipline (75). The four Gospels are the books written by the evangelists Matthew, Mark, Luke, and John which have for their central object Jesus Christ, God's incarnate Son: his life, teachings, Passion and glorification, and his Church's beginnings under the Spirit's guidance (124, 514).