Jesus blood never failed me yet

So here is a tune for you on Good Friday. The story behind this song goes that it is a recording of a  homeless person from around Elephant Castle and Waterloo in London. On listening to it later Gavin Briars discovered "When I played it at home, I found that his singing was in tune with my piano, and I improvised a simple accompaniment. I noticed, too, that the first section of the song - 13 bars in length - formed an effective loop which repeated in a slightly unpredictable way". See if you don't sing this song for the rest of your life.

(It sounds to me like this is the version with Tom Waits singing along, which was obviously not in the original.)