It is THE body of believers, not just any group of people claiming to speak for Jesus. He started a Church and gave it structure and authority. If you are outside that authority, then you are not in communion with his Church.
It isn't just any body of believers, you are correct. It's those member, no matter where they are, which believe that make up the body, and to them the authority of God is given.
Of course he was. YOU are Peter, and I will give YOU the keys to the kingdom.
Not at all. Peter received the same thing that you and I receive by becoming part of the body of Christ.
Peter can speak for Jesus. I cannot.
First: Peter didn't speak for Christ but testified about those things which he was taught and what he saw.
Second: You can testify on behalf of Christ with as much power as Peter did. If you don't think so then you have made God a respecter of persons which Peter said He wasn't.
That is not correct. Do a little research.
It is very correct. I've done my research.