So, I'd been thinking lately about the Biblical myths C. S. Lewis chose as the inspirations for each of the four books in his Ransom series. The myths themselves aren't that hard to identify, but looking back on them now I'm wondering if there's some unifying thread I missed.
OUT OF THE SILENT PLANET: the legend of War in Heaven and the fall of the Angels
PERELANDRA: the Garden of Eden on the cusp of the Fall
THAT HIDEOUS STRENGTH: the Tower of Babel
THE DARK TOWER: Cain's children and the Mark of Cain (possibly with a bit of Cain thrown in)
Two of the four come straight out of the Bible, one Old Testament, the other New. One is Apocryphal (Book of Enoch), another part-canonical, part apocryphal. If there's a pattern here I don't see it. Perhaps the Biblical theme is all that was needed.
Something to ponder over and see if at some point a plausible answer pops out.
current reading: THE ELUSIVE SHIFT by Jon Peterson (2020), and ADRIFT ON THE HAUNTED SEAS by Wm Hope Hodgson (assembled 2005)