This one is for Curtis, although I am sure he already knows that the Blues are spiritual indeed. They deal with flushing the impurities from our systems that cause us pain and keep us from "feelin' alright."
The vocals are tremendous, as one of the greats of the popular blues scene grunts and groans out "the pain down inside that won't be denied," and that keeps him from "bein' satisfied." The song is clearly about the self (small "s") and how "letting it go" is so important to one's spiritual well-being. The sense of the bluesman's relief at the final splash as it departs and his final cry of "I feel alright!" is one of the most poignant spiritual transformations I've ever heard in music. http://www.youtube.com/watch?v=ic3g8Xnf7LI