Matt, I apologize for being too cynical and aggressive before, I realize now that no souls are won for Christ that way. In response to your question of proof of this oral teaching, this extra-biblical revelation, binding upon the believer, I think that the Church ahs expalined that there was only One revelation and that was Jesus Christ himself. The Word made Flesh, is the entire revelation en toto. We do not believe in any other Revelation that adds to that. What we do recognize is that there was an endless amount of Revelation that the Apostles recieved from Christ, by simply living with him for three and a half years, none of which contradicts the Spirirt of Scripture, since God cannot contradict himself, but alot of which was not explicitly included in the writings of the NT. If you take a look at the letters of the NT, thier subjects were quite targeted to the problems that there audience was dealing with and in no way were designed as a complete listing of Salvific information, filled with everything that Christ transmitted to the Apostles. I, honestly would like to see in Scripture where it says that everything that Christ wanted to tansmitt to us would be written down and become the Only Infallible or innerant rule of faith. Christ did not come to commission men to write books, he came to start a Church, a church that would be united and universal for the whole world to be a part of and that would lead all people in every generation into all truth, with His authority and be able to say definitively, “Thus sayeth the Lord” and be able to say in every generation, this is what scripture means and this is what you need to be saved and this is heresy and this is truth. He gave us that gift and I urge you to tread lightly when urging people to leave the only Church that claims to be the Church of Matt 16:18. No other Church claims to be the One Holy Apostolic Church of Christ. with the Keys of the Kingdom. As St. Augustine said " Where ever the successor to Peter is, There is the Church" I would urge you to pray an honest prayer along the lines of Scott Hahn, which was something like " Lord I will follow you wherever you lead me, no matter where that is, even if it is the Catholic Church,."