"Hi. Original poster of the song here. Want to reiterate that it’s VERY UNLIKELY that this is a religious song.
Also, not sure this’ll help, but here’s some of the other artists that was on the mix tapes with the song - though they were likely recorded over a number of years and probably also over several Chicago area radio stations in the early to mid-70’s:
Bob Weir, Doobie Bros., Poco, Brewer & Shipley, Jimmie Spheeris, Souther-Hillman-Furay Band, Mason Proffit, McKendree Spring, Bonnie Koloc, Jim Post, Heartsfield, Buffy Saint Marie, Fairport Convention, The Eagles, Spirit, Barclay James Harvest, Newgrass Revival, Xit, The Guess Who, The Edgar Winter Group, Firefall, Redbone, Gordon Lightfoot, The Hollies, James Gang, The Band and others."