When I looked into "canon criticism" or "canonology" a while back, I came across numerous (alleged) criteria for whether a book is/was included in canon, such as "Old Testament books had to be written in Hebrew." However, for each criteria, it seemed like there was an exception. (In this case, the book of Daniel, for instance.)

So, I concluded that the Holy Spirit must have just guided the process, and that perhaps this is an instance where we cannot attribute natural reasoning, and just have to have faith.

My question is - did I miss something? Is there actual rational criteria for whether a book is considered part of canon?


  • I am referring to the most widely accepted 66 books of the Christian Bible
  • By "rational", I just mean criteria which could be understood through human reasoning without supernatural assistance
  • I am not limiting answers to the historical criteria that the church fathers originally used
  • It is OK to answer with "no there are not", but please elaborate / prove your case with references
  • One problem: They did not create the Protestant canon. So the question will be hard to answer as posed. So you'd have to look at the books they did canonize and start with them.
    – user304
    Commented Apr 19, 2012 at 15:30
  • @RiverC If you are referring to the differences between the Catholic Bible and the Protestant Bible, I don't think that is relevant (but I may be wrong.) I believe the books which are different were considered "deuterocanonical" by the Catholic church, which means "secondary to scripture", so the question would still be relevant. Correct me if I'm wrong.
    – Jas 3.1
    Commented Apr 19, 2012 at 15:47
  • 1
    There are actually two questions with very different answers. It depends on which testament you want to address. Commented Apr 19, 2012 at 15:50
  • Well, if we're looking at their reasons, we have to look at the canon they created, not a given collection of books we have today. That's the only proper way. Also, there's the Orthodox Canon too, which is the eldest of them all.
    – user304
    Commented Apr 19, 2012 at 15:51
  • If we're talking about the 66 books of the Protestant Bible, there's some history of how certain books got dropped as well, which I can't cover (frankly, I've heard several stories which may be all true.)
    – user304
    Commented Apr 19, 2012 at 15:56

3 Answers 3


This is a difficult question, given that human reasoning is itself flawed. But if we were to look at the canonization process, the most we could say is that it must be not be absurd; Consider how Matthias was chosen to succeed Judas; even though the process of 'drawing lots' seems irrational, the lots were being drawn against a few possible candidates and not merely randomly at large. So the lots were used to make the decision against equally qualified candidates final in a way that no-one could claim favoritism. A very rational choice if there is one.

From my own study (and it has not been perhaps as extensive as many) these seem to be the criteria that explain the process in the most rational fashion:

  1. Traditional usage. Writings being added to the rule required that they were traditionally accepted for the use in teaching, admonishing, public exhortation, quotation and so forth. The reasoning here is obvious; this is the primary reason or use for the canon itself: So that a given locality does not have to ask the Bishop who has to ask this other Bishop who has to look at what they're about to read to determine whether its okay to be quoted, to be taught from, to be interpreted as prophecy, or to be announced publicly in liturgies and other prayers. What I mean by this is simply that one may consider this or that book quite true, but if it had no traditional usage, its position would be tenuous. This explains why some other epistles did not get added to the rule; there's only so much time for public exhortation in prayers and liturgies of the scriptures themselves.

  2. Not redundant. Some amount of redundancy is allowed, but later letters (if you look at the Apostolic Fathers) contained a fair amount of redundant material, simply re-iterating what was in the Gospels and Epistles of Paul, Jude, John, James and Peter.

  3. Has a special position. The writings of St. John had, as far as I can tell, a special position in the minds of the early Church. He was a great hero of the faith, and as we may recall, was the one surviving Apostle. His works - especially Revelation - are given special consideration because of the magnitude of his reputation as a true Theologian.

  4. Not praxis. This means, documents which were pure praxis (rules for practices) were excluded such as the Didache. You will notice that there are often problems with Paul's letters where he is 'speaking as a man' - giving practical advice for a given community's situation. Looking back now, we don't know the situation he was speaking to, and thus it is easy to misunderstand his advice. So pastoral letters were mainly excluded, though Paul's seem to have an elevated status (even Peter recognizes this in one of his own letters.) Paul's letters may be pastoral, but they are also theological and prophetic.

  5. Part of the Septuagint. Everything in the Septuagint was accepted without question as far as I can tell, since it was the prior canon (what the 'scriptures' meant if a New Testament document refers to them.) The Septuagint - the Greek Old Testament - was the Early Church's canon of scripture.

  6. Not pseudopigraphia. This is to say, the author/authorship was known and accurate as far as they knew. So Hebrews was believed to be the work of Paul (which it probably was.) The works attributed to John were either his own words or authorized by him (as with the Gospel of John.) The gnostic gospels were pure pseudopigraphia; faked names against unknown sources.

  7. Not written by a heretic. Simply put, some men who entered the faith later recanted; their works would be considered suspect and not included.

So take these criteria and look at The Shepherd of Hermas. Very popular, but never met criteria 1: being read or declared in church. It was a symbolic, poetic work and is difficult to understand. It would fall in the category of something like The Great Divorce, being that it is probably true and perhaps prophetic even, but is the wrong genre to be in the canon entirely.

  • Interesting... thank you for your thoughtful answer! If it's not too much to ask, would you be able to provide any references for this information?
    – Jas 3.1
    Commented Apr 19, 2012 at 18:42
  • I wish! I would have to dig through what I've read - its from a myriad of sources and some of it is synthesis based on reading disparate sources.
    – user304
    Commented Apr 20, 2012 at 12:55
  • for an expansion on the comment re Hebrews, see here Did Paul write the Epistle to the Hebrews? There are a wide range of researched views on the topic, but in short - we don't know for certain who wrote it.
    – warren
    Commented Apr 23, 2012 at 13:41
  • @warren: the Fathers at the time were pretty sure Paul wrote it (he may have written it in a disguised fashion) and so they considered it genuine. It may also be that it was collaborative.
    – user304
    Commented Apr 23, 2012 at 14:30

In addition to the criteria mentioned above, historically there was a claim of apostolic authorship. See: https://christianity.stackexchange.com/a/5527/1039


I would also like to point out that during early christian persecution, destruction of christian writings was not uncommon. If, then, some Christian at the time had a large assortment of Christian writings, it would be logical for him to select only the best books for preservation for practical purposes.

I personally believe that this is the process which has preserved most of the NT. The Gospels were considered very important, various apostolic letters, revelation, etc. There was a sort of natural criteria for the canon, since an official one could not have been produced under the circumstances of such persecution. It's resonable to argue that perhaps many other Christian books, both known (ie the lost espistles of Paul) and unkown were destroyed at this time.

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