To ensure that the preaching of the Gospel continues until the end of each century, the Apostles appointed successors, the bishops. Whoever listens to the bishop listens to Christ. It is the bishop's duty to complete and continue the work begun by the apostles, to whom the whole flock has been entrusted, to teach the doctrines of the faith, to ordain... Catechesis on the Second Vatican Council, structure, with Fr Justolat Rafaralahimboa.