Oh, that Zen stuff. Yeah. Didn't bother me as I found it more generically "spiritual" than anything "religious". YMMV, of course.
Bob was one of the very, very few "jazz musicians" I knew at the time who were following Miles' music's growth & evolution and who actually got it. I'm not aware of any codified, published commentary by him other than liner notes, but the first time I read the Enrico Merlin thing, I swore it was written by him.
Of course, he denies it completely, but...