We believe, based upon Scripture and the early Church Fathers, that the Church is able to interpret Scripture infallibly. That is what separates it from the churches of Luther and Calvin and Eddy and Swaggart and Smith and Hagee and...
One Holy Catholic and Apostolic Church of Jesus Christ. Jesus founded it - why would He let it fail when He said that He would always be with it?
Jesus is the only head of the church on earth. Not some impostor in Rome who will have to answer for his conceit.
Because he didn’t found that church. He had a body of believers who were in a number of churches after Christ was resurrected.