At sixty-eight, Els could think about the question only a little at a time. He read what he could find—the distilled knowledge of hundreds of experts. He couldn’t follow all the physiology. The body had evolved to feel fear, hope, thrill, and peace in the presence of certain semi-ordered vibrations; no one knew why. It made no sense that a few staggered chords could make the brain love an unmet stranger or grieve for friends who hadn’t died. Nobody could say why Barber moved listeners and Babbitt didn’t, or whether an infant might be raised to weep at Carter. But all the experts agreed that
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