Catholics see the Church as the servant of Christ the King and of His Kingdom. We only have what He has given us, nothing more. His Kingdom is not of this world, therefore the Church cannot take the values of the world and dilute the precious Truth He has left with us. The Church cannot change Christ's message but only re-present it to subsequent generations. We have nothing of ourselves to offer mankind, all that we have is his.
He has promised not to leave us orphans but to send us the Holy Spirit to lead us into all Truth.
So Pilate said to him, "Then you are a king?" Jesus answered, "You say I am a king. For this I was born and for this I came into the world, to testify to the Truth. Everyone who belongs to the Truth listens to my voice."
Christ's Kingship is intimately bound up with the Truth. His followers are charged with teaching and passing on this Truth.
Then Jesus approached and said to them, "All power in heaven and on earth has been given to me. Go, therefore, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, until the end of the age."
Doctrine, teaching, is part of Christ's commission to the disciples. It is not any doctrine, it is the authentic doctrine of Christ.
He said, "And I tell you, you are Peter, and on this rock I will build my church, and the gates of Hades will not prevail against it. I will give you the keys of the kingdom of heaven, and whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven."
It is not an arbitary power that Peter is given but one founded directly on Peter's declaration that Jesus was "the Christ, the Son of the Living God" which "was revealed not by flesh and blood but by the Power of the Most High".
The nature of the Catholic faith is always about looking back, looking back to Christ, like a good servant it has its eyes constantly on him, its ears constantly straining to hear His voice. Novelty is not the nature of Catholicism - or Orthodoxy for that matter - yes, we believe in the development of doctrine, but that is like leaven in the lump, or the seed growing in the ground, it is the action of the Holy Spirit, working silently, gently, it is never a violent revolution.
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The ordination of women by the Anglican Communion is something new, not found either in scripture nor in that which has been handed onto us. The Apostolic Churches cannot ordain women, despite all the dignity the New Covenant gives to them, simply because we are servants and Jesus, the King has given us no authority, and we dare not presume to take that authority to ourselves. Anglicans and Protestantism, generally, claims that authority, because it understands authority as consensus of opininion, rather than being of God. We dare not make that presumption, lest we prove to be unfaithful servants, doing our own will rather than continually praying that His will be done on earth as it is in Heaven.