Lyric discussion by RiversideGuitarist 

Yes, they did cover it from " Fred McDowell and Rev. Gary Davis". The Reverand also wrote "Prodigal son" that they covered as well. I believe personally it is about the high power. God doesn't care if your rich, poor, but when he's ready you gotta move! Great song. Apparently Fred and Gary were very flattered with the stones version because they kept to the original style of the song but added some extra "oomph" with the drums and double guitars. One of the stones most traditional blues song IMO.

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