My buddy Scott Hahn, the Bible scholar, likes to point out that the Psalter has more songs of complaint than any other kind of song. Complaining, he says, is different from grumbling. The Israelites grumbled in the desert, to each other. David complained- to God. We complain to someone we trust. Old King David wasn't just kvetching; he was complaining to a Father. He was singing the blues.
-Dion DiMucci, Dion: The Wanderer Talks Truth (2011)