Mark, I’m going to go back to Craig’s quote you brought in and start there.
I believe this quote refers back to page 22&23:
He [Craig] recounts how “frightened and troubled” he was when one of his theology professors remarked that he would renounce Christianity if he could be persuaded of its unreasonableness. This fear led to outright alarm as Craig discovered extremely intelligent students were leaving behind Christian faith in the name of reason. His encounter with Jesus Christ was so genuine and real, and his experience with Jesus had invested his life with such significance, that Craig simply could not throw it all away just because it was deemed irrational. “If my reason turned against Christ,” Craig told one professor, “I’d still believe.” [emphasis mine]
Which is referenced on page 90:
What is needed in our witness, if those we engage are to be edified, is a poetics that performs the essentially Christian in which there is no gap between the form of witness and its content. We do not need a philosophical argument that rationally justifies the objective content of Christian belief to show us it is edifying. Another irony, of course, in Craig’s testimony is his open acknowledgment that genuine Christianity was shown to him powerfully and convincingly, without arguments or evidence, through the lives of those who witnessed to him. [emphasis mine]
I am reading your comments about what is liminal through what I understand Penner’s use of the idea to be: the space between the form of witness and its content. Ultimately Penner says there should be none, but when he speaks of a gap, it is liminned by the impulse to cling to Christ.
I can understand that you would see that gap filled differently, but that belief and practice must be unified. (I’ve tried to faithfully characterize what I understand you to mean.)
What I understand from your further comments, though, and vigorously disagree with, is a general judgement against Christians’ understanding of our experience as rooted in things supernatural and a claim of superiority of yours. I’m not sure how else to read it, particularly these:
Thus my overly long-winded reply, attempting to demonstrate that Christian belief absolutely includes an understanding of what I think you mean by “epistemic humility.” In spite of our regular failures to live that humility, it’s part and parcel to the teaching. It is what we’ve signed up for.