The harvest is good and one reaper or even several would not suffice to gather all of it into the granary of the Lord. Yet the Roman Church remains the head of all the churches and the source of Catholic teaching. Of this there can be no doubt. Everyone knows that the keys of the kingdom of heaven were given to Peter. Upon his faith and teaching the whole fabric of the Church will continue to be built until we all reach full maturity in Christ and attain to unity in faith and knowledge of the Son of God.
-- Saint Thomas Beckett from a letter