The basic structure of the blues is almost always the same and the repertoire of riffs fairly limited. Indeed, part of the richness of the blues derives from its narrowness: any slight deviation takes on great significance within a system that is so restricted, in which the expectations of the listener are so determined. The arc of the song becomes evident from the first few moves. The expressive intensity of the blues derives from its roughness and simplicity. When you no longer have to focus on what the next change will be, you focus on how to express yourself within it, how to exploit it emotionally. Spontaneity follows on and reflects discipline.
-- Crispin Sartwell Six Names of Beauty
Crispin Sartwell has a blog: Eye of the Storm
