Tip of the old scrub brush to Disciple/Methodist David Bates, with whom I used to enjoy singing bass on the back row of the choir.
Atheists have a very witty lyricist.
Update: “Austin City Limits” asserted its copyright on that version (might be available at their website). Here’s the song from a handheld camera at Merlefest, courtesy of Freedom Tuners:
Also via Boing-Boing; credit where credit is due.