CONCLUSION ON “KEYS” OF MATTHEW 16:19
(A) The keys of the kingdom represent authoritative teaching, and Peter’s role as holder of the keys is fulfilled now on earth as Christ’s chief teacher;
(B) The keeper of the keys, according to the background of Matthew 16:19, has authority within the house as administrator and teacher (cf. Isaiah 22);
(C) The authority of the keys is likened to that of the teachers of the Law in Jesus’ day, and the correct interpretation of the Law given by Jesus is accessible to the early community (the Church) through the tradition of Peter;
(D) The authority of the keys of the kingdom (Matt 16:19) are not different from the key of David (Isaiah 22:22; Rev 3:7), since Jesus controls and is in possession of both;
(E) Therefore, the keys (or “key” singular) represent FULL authorization, FULL authority, PLENARY authority, SUPREME authority;
(F) The keys of the kingdom are NOT to be understood as merely entrance keys (or “opening the door of faith” to the Gentiles), but rather to the bundle of keys carried by the chief steward who regulated the affairs of the entire household (cf. Isaiah 22), which in the New Covenant is Christ’s universal Church (cf. Matt 16:18; 1 Tim 3:15);
(G) Peter, as holder of the keys, is not merely the “gatekeeper of heaven” or “doorkeeper” but is therefore the Chief Steward of the Kingdom of Heaven (the Church) on earth;
(H) Further, the power of the keys can represent baptismal or penitential discipline, excommunication, exclusion from the Eucharist, legislative powers or the power of governing the affairs of the Church;
(I) The language of “binding” and “loosing” is Rabbinic terminology for authoritative teaching or a teaching function (or “Halakhic” pronouncements), denoting the authoritative declaration that an action is permitted or forbidden by the law of Moses, and in the Church the authority to pronounce judgment on unbelievers and promise forgiveness to believers;
(J) The “binding” and “loosing” refers to the Magisterium (the teaching authority of the early community, which Jesus was establishing through His apostles in His Church) to declare a commandment or teaching binding or not binding, forbidden or allowed, and God in heaven will ratify, seal, or confirm that decision made on earth (cf. Matthew 16:19; 18:18).