Why do I say it is unbiblical to use only the Bible? The reason is that the Bible never says anywhere in it that you should use just the Bible. There is not one single verse that says, "Use only the Bible for the truth about God." The belief that you should use only the Bible is an idea that comes from late human tradition. It was started by the Protestants sixteen hundred years after Christ founded the Catholic Church.

The Bible says that we must "stand fast and hold onto the traditions which we have learned, whether by word or by epistle" (2 Thessalonians 2:14). Read more about the important of the tradition from the apostles in 2 Tim. 1:13-14; I Cor. 11:2, 16, 23; 2 Thess. 2:5-6; 2 Tim. 2:2. We must obey the Holy Word of God in the Bible and the tradition which has been handed on by Christ and His Apostles to the Church.

However, only one Church goes back to the Apostles -- the Catholic Church. All others were founded by men, not by Jesus Christ our Lord. Jesus founded the one Church on the rock who is Peter; Jesus gave the keys of the Kingdom of heaven to St. Peter, not to Martin Luther or any other founders of "Christian" churches.

Where is it in the Bible that Jesus commissioned these other men to found churches other than the one He started with St. Peter and the Apostles as its foundation? He did not commission any of them to celebrate the Eucharist so that His Body and Blood could be present to us. Only the Apostles and their successors were given the authority to bring the very Body and Blood of Jesus down to us in the Mass that Jesus commanded us to celebrate.