Interesting to read his eclectic take. I think it's cool he bridges the "Catholic left" and "Catholic right" in his list.
Speaking of the Bible, Maureen at Aliens in this World mentions St. Gregory's views:
St. Greg’s Homily 6 on Ezekiel talks a lot about how to read Scripture, because the topic of “the book written on, inside and outside” comes up. (From Ezekiel 4:9 and Revelation 5:1.) Since it’s pretty commonly seen as representing the Bible itself (among other things), it’s a handy time for St. Greg to bring up his thoughts.I wonder if there might be two different varieties of "Bible alone Christians". One of the more fundamentalist variety and the other more of the skeptical kind. One holds all Scripture in great reverence and thus inadvertently attests to the validity of the Church, since most of the documents of the NT are not from eye-witnesses. These folks generally ignore the church that follows after the canon was finished due to supposed corruption of the true faith. Others trust the gospels over the church for historical, not religious reasons, since those documents are eye-witness accounts of Christ. Looked at this way, one can see why historical criticism is the be all and end all for some, since they try to base their faith not on Faith but on science, to the extent historical research can be called a science.
St. Greg also sees the Bible being read in different ways: according to the letter by newbies, close reading by “vigilant” people (though still of literal points), and more spiritually and allegorically by more spiritually and Biblically experienced people. (The moral points are pretty much figured out by everybody, although more experienced people will understand these things better.) Literal meanings are “written on the outside”, and spiritual meanings bring you further and further “inside” the book.