Well, this is turning into something quite differrent, I just wanted your guys view but I cannot seem to shut up!
ok, but this is going to get me eaten up because it takes so much longer to explain and I do not have my other verses to show what they mean all ready yet.
BUT, let me try, in short, which will leave me to be eaten alive, but concise manner.
Both verses too relate to eternal life, ie gates of hell.
Peter, did receive authority(keys of kingdom), which I think we need to be clear about how he CHOSE to use this based upon the whole NT, not just Matthew 16:18, or the keys to the kingdom. I cannot explain how he administered that, with the other apostles, although he is primary, concise enough without all of my verses.
The Apostles, with Peter being primary, set up the form of church government(local control but I know that you will not buy that) in the hands the elders, deacons, etc. I do not believe that a single bishop over a whole city is biblical, that developed about 50 to 100 years later. Okay, the keys(which Peter had) are their ability to expand everything, which they did, especially as it relates to the organization of his church, by which the message of eternal life was spread. We see this during that whole Apostolic era. Understanding that, for me, church in these passages is not talking about a huge world wide organization headed by one person, which would contradict the rest of the Bible. When we next see the keys, Christ has them in Revelation. Jesus allowed Peter and the Apostles to spread his message of eternal life by giving Peter the keys.
bind and losen
essentially the same thing but it is given to all of the Apostles two chapters later. Once again, the clear way that Peter used the key and losen and binding was with regards to the Gentiles. Jesus said he came for the Lost Sheep during his earthly mission. Peter, in his role of keeper of the keys, along with James and John decide exactly what that meant. Thus we have a truly universal church with ethnic and racial diversity, instead of a smaller sect of Judaism.