A major theme in the lectionary texts this week is nourishment of the body and soul. Isaiah asks why we "spend [our] money for that which is not bread, and [our] labor for that which does not satisfy" -- but the truth of the matter is that we do it because it offers us what we desire (or think we desire)... even if it doesn't provide us with lasting sustenance. Of course, there's no better example of this than the American obsession with junk food, which has given rise to a powerful multi-billion dollar industry that is a key contributor to the epidemic of obesity.