I've also wondered about the line "If I could, I surely would, stand on the rock where Moses stood." It shows up in "Mary Don't You Weep" and various other places. I think the Carter Family did a version (don't know if it was before or after Leadbelly. Ialso seem to remember it in an early song by The Band" ("Jemima Surrender"?). Which rock?
Nice to see a thread with a theological bent.
Nathan Sarvis Denton, Texas