Having found so many more books read for the Philosophy of Religion course than remembered, I pulled out an old transcript and found the reason. Grinnell College's courses were generally four semester hour ones, but students were allowed to take some as "plus two" with the instructor's permission, in other words, with six hour coursework. I had done this for Schaick's and this in part accounts for all the books, mostly on mystical traditions, which were read but not discussed in class, and for my memory of many informal meetings with Paul, usually in the Forum, the college's student union.
Dr. Schaick, as mentioned elsewhere, was a physicist whose reading of Heidegger's Being and Time inspired a second Ph.D., this one in philosophy. Although Paul's enthusiasm got me to purchase Heidegger's tome at the bookstore, I didn't actually read it for a couple of years. Instead he had me read at least three books on Zen, two by Krishnamurti and maybe one or two collections of dry essays on the philosophy of religion (those may, however, have been in the course curriculum with Anselm and Otto). This all makes sense because Heidegger, from Being and Time onward, was a mystic much in the Zen sense.
And what is the "Zen sense"?
Zen Buddhism, as portrayed in the aforementioned books, is an anti-religion in that it either attacks or ignores the metaphysical conceits of Buddhism, focusing instead on clearing the mind of preconceptions so as to allow being to be. The practitioner thus becomes present in the moment, aware and in tune what what is to hand--a very practical aim. Of course, there is more to it than that in that "the moment" when stripped from preconceptions of such things as "my personal history" or of "world historical purposes" etc. is now timeless in this sense just as the practitioner is now not so-and-so, but the buddha-mind.
D.T. Suzuki is very good at giving the historical, sociological, theological and philosophical background to Zen as a means of contextualizing this anti-contextual practice, his rather dry academic discourse almost serving as a sort of koan pointing the way to its own transcendence. He is, however, dry and academic. For those who don't like that, try Shunryu Suzuki's (no relation) Zen Mind, Beginner's Mind.