Rhythm, repetition, making patterns--these are not only important devices for shaping the strange and abstract instrument/object we call a poem or a story, but they are craved as well because of our primordial need for reassurance, the sense of security we get from moving over the known. A mystery doesn't lose power in revisiting. Writing is not just to know, it is also to console. We need to be reminded that we are part of the obscure rhythm of birth and decade. It is the humming that matters.