I've always loved this hauntingly beautiful song with it's roots in slavery and there have been as many versions (each with it's own unique chord changes ) as there are musicians on the planet. I ran across this clip and thought it was especially moving. I've done many versions myself and am thinking of doing a new one and maybe posting it if it comes out ok.
chas
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"Faith means not wanting to know what is true." [Nietzsche]