The idea that Peter or Paul founded the church at Rome does not square with the historical facts.
What the Bishop is saying is that both Peter and Paul ended up in Rome and taught there prior to their martyrdom. Of course, there were Christians there before the Apostles came, as is clearly demonstrated in the letter of Paul to the Romans. But the Church there was not the recipient of Apostolic Teaching until Peter and Paul came there. As the NT says the Church is built on the foundations of the Apostles and Prophets. It was their teaching there prior to their martyrdom that built a strong foundation for the Christians that lived there.
All of the evidence has to be taken together. We believe that some of the 3000 baptized at Pentecost may have been from Rome, and took back the Teaching.
Do you not believe that Peter and Paul were in Rome?
What do catholics do with traditions that don’t square with the facts?
We know that everything squares. We may not have all the details, but we know that Peter and Paul were in Rome, and it was their Apostolic Teaching that laid the foundation for the believers there. We know that Christians were in Rome before Peter and Paul came there. We don’t know who they were, or the exact years the Apostles labored there.
Go back and read John 16:13. The context is about the disciples and not the church.
Can you please explain the difference, because I don’t get it.

Did not Jesus call the disciples “out” from their lives to follow Him? Is not the ekklesia the “called out ones”?
The church was not in existence at this point in time. That doesn’t happen until Acts.
Catholics believe that the Church was born when the water and blood flowed from the side of Christ on the Cross. But even before this, Jesus trained His disciples on how to operate the Church. He instruced them, that when there was a dispute, it should be taken to the Church, not the Bible!
You are saying that those to whom Jesus gave HIs promise never to leave got lost. How could this happen, unless He lied?
Do you have the reference for this?
How dare you ask me to go and find what you posted!!

Be careful, or I will REALLY give references to what you have posted. You said that, just because the early Fathers were closer to what the Apostles taught, that did not mean they got it right.
Not necessarily so. Although the early church devaited from the scriptures in part very early on this does not mean all was lost. What does it mean “Jesus did not watches over his word to perform it”?
Jesus promised that He would be with the disciples “until the end of the age”. He commissioned them to “teach all that I have commanded”. That Divine Deposit of Faith, (all that Jesus commanded) is what He made them responsible to teach. God provides where He guides (I learned that from a Protesant!

). God would not commission the Apostles to do something that He was not able to give them sufficient grace to do. He gave them His full Word (Isa. 55:11). He sees to it that His Word accomplishes the purpose for which He has sent it. It is not by the will of man, or by the frailty of man, but by the Power of God!
Can you give me an example how catholics interpret scripture as taught by Jesus and the apostles?
Sure! Jesus said “This Is My Body”. We believe He meant exactly what He said. Just like, when in Genesis, He said “Let There Be Light” and there was light. He is creator. He can make all things out of nothing. He give us His flesh to eat.
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The church was not in existence at this point in time. That doesn't happen until Acts.
Catholics believe the Church was born from the side of Christ, when the water and the blood flowed out.