It most definitely is not untenable. How else do we know the Bible is the Word of God? Because the Bible tells us so?
Are you seriously suggesting that you can make a bad argument good by arguing that it is needed? If your argument doesn’t hold together (and I have explained the reasons why it doesn’t), then it doesn’t hold together, and the consequences have to be faced.
However, I don’t think we are as dependent on the wisdom of Old Princeton funneled through Mr. Keating as you believe. Christians believed in the Bible before there even was a Princeton.
The short answer as to why we believe in the Bible is because the Church tells us to. Not that there aren’t some independent reasons for believing in the Bible, but apart from the Church I for one would only believe in parts of the Bible if that. That’s one reason why Keating’s argument is so strange. One can see why the Old Princetonians needed this kind of argument, because they were sola scriptura Protestants. But Keating’s adaptation of their argument reverses the historical Catholic position that we believe in the Bible because of the Church rather than the other way round. It accepts one of the most foolish and untenable Protestant premises and tries to use it for Catholic apologetics.
The larger point is that we don’t need one single knock-down proof to justify our belief in Christianity. That is not how the justification of our beliefs normally works. We believe what we believe on the basis of a number of factors working together.
With that caveat, I would actually make almost the reverse of Keating’s argument. I would start with the
Church as a historical reality, move from there to the Bible as the Church’s book, and from there back to the Church on the basis of the Bible’s teaching about the Body of Christ (and the passages that you and others have cited in this thread about God’s providential care for the Church).
But first and foremost I would start with my own situation. I am not an Archimedean lever floating out in space. I’m a human being who learned about truth and beauty and goodness from my parents and grandparents. They pointed me to Jesus Christ as the Son of God, and they pointed me to the Bible as the Word of God. As I grew up I found that many of the things they had taught me did not hold up, but I found (to my delight and surprise) that over and over again the wisest and best and most beautiful things I encountered in the world pointed me back to Jesus Christ and the Scriptures. I discovered that the writers who had most of value to say tended to be Christian; that while the arguments for Christianity were often flimsy, the arguments against it were generally even worse. Negatively but importantly, I found nothing that could take the place of Christianity as an explanation of the human condition and the existence of the world, and as a source of value.
But here came the big surprise: I discovered that whereas I’d been told that the story of the institutional Church was one of constant corruption and decay (with periodic revivals due to the work of the Spirit), in fact the same witnesses that pointed me to Jesus and the Scriptures pointed me to the historic Church. I read Bede’s Ecclesiastical History and recognized him as a fellow believer, and wondered why I hadn’t been taught to venerate saints and the Eucharist as he did. I read the work of Henry Suso (a late medieval mystic whom I’d been taught to regard as a Protestant before his time) and felt the rank stench of medieval piety in my nostrils. If I am going to be a Christian–and for all of my doubts I have still not found an alternative–I must be a Christian in company with this historic body of witnesses, who in the midst of their sins and errors and corruptions have been the source of so much that is good and true and beautiful in the history of the world.
And so we come to my “reverse Keating” argument, complicated by the fact that I was taught the errors of sola scriptura and the invisible Church growing up. The above is what I am talking about when I say that I begin with the Church. I look at it as historical reality and I recognize it as a tradition with which I want to be associated. And being part of the Church means that I accept Scripture as God’s Word. The fact that I was taught to love Scripture and find much of it enthrallingly beautiful certainly helps, but logically my reason for accepting the canon as a whole is the authority of the Church. And I accept the Church because I must choose to believe something (even choosing not to believe is still a choice), and this is the best thing I have found to believe in.
You have been misled into accepting a brittle and narrow conception of rational argument which bears no resemblance to how people normally make important decisions. Two books I would recommend which have helped crystallize my views on this subject are William Abraham’s
Introduction to the Philosophy of Religion and William James’
The Will to Believe.
Edwin