‎”No chain is stronger than its weakest link, and the weakest link of the chain of Popes was the first (Peter). But that weak link was held in the hands of Christ. That is why the papacy will never fail.” – Venerable Fulton Sheen

Christ Himself have the Church firmly in His hands, and He will not let go. He is faithful to us just as we are faithful to Him. The Church He has built and the authority He has given to Peter to feed His sheep, will never fail.