If divine inspiration is neither non-human speech nor invariant content, you have stripped it of every objective marker that could distinguish it from ordinary human thought. A claim that tolerates wholly human wording and continuous change is, by definition, empirically indistinguishable from human tradition. What cannot be distinguished from a natural process by any observable criterion cannot be credited as a supernatural process in historical analysis.
If divine inspiration is ever actual, then it is a personal - a subjective, an inner - experience which you have already noted as being inaccessible to historical analysis.
So what? That just shows a limit to the applicability of historical analysis. Does that bother you? If so, why does it bother you?
With regards to the notion of "invariant content", I will again use
love as an example. Do all instances of love have any commonality? Let us just stipulate that all love has this in common: Love as an act is an intention made manifest as a doing done for the sake of an other. We could just as well say that this is invariantly the case, and, yet, the content or details of love can be - and in fact are - situationally unique, anything but invariant, and very much non-ordinary even when made humanly manifest. That regards one aspect of the indeterminateness of love, and it shows that "invariant content" is not necessary for inspiration to have a divine origin, given a divinity closely associated and identified with love.
To “go beyond the text” you need independent data—contemporary testimony, external documentation, or observable effects. We have none for Paul’s inner states. Without such data, appeals to subjectivity are speculation.
You need "independent data" for the application of historical analysis. "Observable effects" can be the previously mentioned
what follows from an experience issue. Paul's story is that he was a persecutor of heretics come to be called "Christians". Is there data independent of that story? Is there the same story told by someone who has no dog in the hunt, so to speak? Lack of such "evidence" would in no way justify restricting what one is willing to consider only to those strictures which historical analysis deems acceptable. After all, non-pathological radical changes in the outlook and behavior of individuals is not unknown - even if such conversion is relatively rare. Accordingly, speculation is absolutely legitimate with regards to attempts at fathoming inner states. That is unless one is disinterested in the inner states of humans.
So, if Paul's person was converted, what matters is not whether he was divinely inspired. What matters is the what comes after his being allegedly inspired. Maybe he was divinely inspired. Maybe he was not. Maybe what had been for him the sense-less babblings of those Christians were made more sensible by the operations of his ever-working mind. For that matter, based on his own telling of his story, the operations of his ever-working mind were essential even after the alleged divine inspiration.
The point is that divine inspiration in no way eliminates the necessity of the thoughtful mind. To put it another way, the reason why divine inspiration is inspiration is because what you refer to as "ordinary human thought" is always necessary following any sort of inspiration - if understanding is to be developed at all. Without understanding and what follows from understanding, inspiration (including divine inspiration) is worthless - and that would be the case from the divine perspective as well.
the letter itself is a tightly argued piece of deliberative persuasion ...
Whoa! Hold on there! You are making a claim about his inner state. That is, by your reckoning, speculation. I, of course, have no problem with speculation in itself. But, putting aside how "tightly argued" his musing actually is, let us continue.
that uses logic, analogy, and appeals to shared scripture. ... If acceptance of his divine commissioning were “unnecessary,” he would not anchor his authority to a revelation claim or threaten anathema against contrary gospels.
Sticking with the inspiration issue for the moment, it is necessary to distinguish between authority as experienced and authority demanding deference.
Authority as an experience (Jesus teaching as one with authority and not like the teachers of the law) is about human experience, reactions and, ultimately, the fact that human understanding is never instilled but only developed. It relates to how humans come to understand apparently new and/or apparently unconventional or even what at first exposure can seem to be eccentric teachings or viewpoints proffered by others.
Generally speaking, it is very rare indeed for the thinking of a person to be converted or transformed immediately as a result of an experience or upon being exposed to some new information or an apparently novel perspective. A person might be immediately and deeply moved by an experience, a presentation, a message, an explanation, a teaching proffered by an other person. Sometimes a person can be deeply moved by the style, the aesthetics of a presentation. Sometimes a person can be deeply moved by the unexpectedness of a perspective, its very newness. Not the newness of being different simply for the sake of being different, not for mere originality of presentation, but because the very content presented brings to the fore matters that the message recipient holds to be significant, matters which have seemingly been missed or ignored or trivialized in the explanations or teachings which have until then been most widely accepted, even emphasized.
This is to say that sometimes a person can be deeply moved - sometimes a person can be astonished - by what amounts to an encounter with information or insight that exceeds even the most well-established, rationally justified conventional thinking or personal way of thinking. Such a thought that exceeds what is already accepted is experienced as an encounter with authority even if, at least initially, its being experienced as authority is not readily, rationally explicable.
An encounter with authority is not experienced as confirmation of an already held belief or bias; authority is not vindication. This is because authority is more a sense which is perceived despite yet lacking explication; hence, that sense is but a seed for an understanding that is yet to be developed or otherwise made manifest.
If a person responds to a teaching (such as any of those put forth by Jesus or Siddhartha Gautama or Gandhi or whomever) with immediate astonished appreciation, that only indicates that the teaching was concerned with some matter(s) already of some concern in the mind of the communication recipient, regardless of whether or to what extent such concerning matters have ever been expressed by the communication recipient.
In such cases, the astonishment occurs in part as appreciation for the fact that some other person has managed to give expression to thinking about some matter(s) of importance which the recipient had not yet likewise been able to produce. Hannah Arendt maintains that any awareness of “what authority really
is” “has vanished from the modern world.” Of course, we still have the word
authority; we still use the word, but, according to Arendt, authority now “is commonly mistaken for some form of power or violence”, whereas actual “authority precludes the use of external means of coercion”. She adds, “where force is used, authority itself has failed.” Arendt also says that authority “is incompatible with persuasion, which … works through a process of argumentation. Where arguments are used, authority is left in abeyance.”
In this regard, authority imparts a sense of being veritably self-evident although still needing further development in order to become understanding manifest in acts and including the production of explication if only to render the understanding in the form most suitable as communication for the benefit of other persons. According to Arendt's characterization, authority does not wield power; it does not threaten or coerce, and it does not seek to persuade. And, yet, authority is somehow not inert. In fact, according to Arendt, “authority always demands obedience”. But, by her reckoning, authority demands obedience without a resort to coercion or (even implied or threatened) violence or persuasion through argument. This means that authority does not impose; it is not an imposition; it does not so much demand obedience as it elicits or evokes or inspires a response, a reaction to the experience of an encounter with authority, a reaction to the recognition that authority has been present and made noticeable, for example – in an expression of some sort.
It is a common mistake to think that the use of logic in expression necessarily indicates an attempt at argument and persuasion. Logic is absolutely compatible with an attempt at expressing the experience had of authority as well as the insight or understanding which follows from such an experience. Logic is compatible because logic is useful for organizing and expressing thinking - even thinking that seeks neither to argue nor persuade but, instead, simply hopes to be useful for others.
Authority as an experience can serve to inspire; it can be an inspiration. Authority demanding deference is an entirely different matter.
To be brief about it, the authority which demands deference is more a political or sociological - let us call it a more immediately practical - matter, and it has nothing to do with divine inspiration (or so I claim). If you want to argue that Paul was in effect taking God's name in vain (or some such similar criticism) as he tried to define and organize the faithful into a church, fine, go for it. That is a different discussion. That discussion does not speak to the good news which Paul preached, and it does not touch upon the question regarding whether Paul could have been or was divinely inspired to preach whatever was/is that good news about God and the relationship between God and human individuals.
The origin claim is not a tangent; it is the fulcrum of Paul’s authority and the early churches’ reception of his letters.
The authority issue has been addressed above. Whatever was Paul's initial appeal to others, it would have been (in varying degrees across the spectrum of individuals) most like the inspiration of authority. The authority of demanded deference would only - could only - appear after there had been a gathering of the identifiable sufficiently-like-minded. It is also to be kept in mind that Paul was not engaging with scholars as he tried to form/find a community. But all that goes to the inner states of his mind as he faced different situations. The origin issue is an insignificant tangent. That does not mean the tangent is uninteresting.
I was recently visiting family out of town, and a younger family member wanted to go to a baseball teammate's bar mitzvah; so, I took him. The rabbi's homily was about
The Story of the Aleph, the point of which the rabbi said boils down to this: We see God in the face of the other person. And the point for this discussion is that there is no talk about God that is not talk about human understanding and human "inner states".
Any "historical analysis" which in effect claims to have discerned Paul's inner states when he spoke as he did in each situation fails as analysis when it does not extend its speculations to alternative explanations for why Paul expressed himself as he did. Such failed analysis as has been presented (and to which this is a response) contributes nothing to considerations into the question of whether Paul's claim of having had an experience of divine inspiration should be accepted. That claim of Paul's is - as has been repeatedly explained - utterly immaterial to what Paul preached about God and the relationship with humans. What he preached was an understanding which itself was and has always been subject to reconsideration, re-expression, and evolution. And the fact of there having been (along with the fact of there being in the future still further) development of understanding does not speak at all against - or for - Paul as ever having been divinely inspired.
the claim is unfalsifiable devotion
Non-sense. It is not - and cannot be - a matter of devotion since it is immaterial. Failure to recognize the immateriality can result in devotion as self-idolatry, but nothing more substantial or useful than that.
You do realize that nothing I have said depends on the actuality of the experience which Paul alleges, don't you? That in itself demonstrates that the claim is not a fulcrum for whatever was the good news Paul preached. The actual issue is understanding and the development of understanding. The issue is not whether Paul was ever divinely inspired. This is the case if one believes in God and if one does not believe in God. Of course, anyone who has never been inspired will likely have a more difficult time in realizing the relationship between inspiration and understanding, but such a person could investigate their own subjective experiences had of having come to understandings - although that will likely be immensely more difficult if their understandings are always rote.