In Response to Kevin, The Church was initiated by Jesus to Peter Matt 16:18. In Matt 16:19 Jesus authorises Peter in giving him the keys of the Kingdom, and states that whatever Peter binds on earth will be bound in Heaven & whatever he loosed(allows) on earth will be allowed in Heaven. This authority of the Petrine ministry was unchallenged or if challenged refuted by the Church, Until Martin Luther (Ex-Augustinian Monk) in 1517. You could argue that as an ex member of the Church Martin Luther was the catalyst for the collapse of the Church. From here, in the last 500 years there are 30000 denominations of Christians, getting further & further from the Church initiated by Jesus to Peter. Whilst Luke 9:49-50 affirms exorcisms being carried out by those outside the Church, it does not diminish the Authority of the Church to bind or loose. Having established the Church Jesus prays to the Father and asks that they may be one as the Father and Jesus are one, so that the world may believe that you have sent me! When the Lord returns (Maranatha) he will be looking for those who have accepted his teachings and lived them. To deny the Church established by Jesus will be a tough question to answer and with the work of Scott Hahn & associates (100;s if not 1000;s of ex evangelicals) a question which can easily be researched? Scotthahn.com May God bless you and yours at Christmas.