I'm pretty sure you could find other philosphy texts that would address this topic, but it will take some digging. The trick is to find the discussions that present some sort of original text then debate it.

Years ago I enjoyed reading Jessie Weston's From Ritual to Romance, to do with the stories of the holy grail. There is a lot of good stuff that she dug out of legends to write that book. I don't recall that this story you are interested in dovetails with the grail legends in her book, but perhaps those who deal similarly with religion and myth (Joseph Campbell, James Frazer, many others) might have some leads for you. I'm not a religious scholar, nor do I practice an organized religion, so I have only a general familarity with the texts. Maybe Weston occurs to me because there was something there. Stream of consiousness? T.S. Eliot. Steinbeck. Lots of folks studied these stories to reuse the stories and messages in their own works.

SRS