To the above, let me just add a Christian perspective [mine], in that the authors of the New Testament must have believed in something along this line, probably believing that they were being inspired by the Holy Spirit to write that which they understood to be true, and making modifications along the way based on what they were exposed to and came to better understand. To put it another way, the Holy Spirit preceded the writing of the New Testament and the selection of the canon, thus not the other way around.
Thus, if we truly believe in the Holy Spirit and Jesus' promise of It's power of guidance, then I must assume that This is still at work today, thus is not only on-going but also everchanging.
Therefore, some items may contradict some specifics in the New Testament but without gutting it. An item that comes to mind is how our universe started, and another is how homosexuality is viewed by many in a different way than what was believed in the early Church.
Again, thoughts from other Christians?