Roky Erickson sat at a corner table at Curra's Grill, eating carne guisada and watching a lightning storm flash above the Austin skies. He scooped up the last of his black beans and rice, sipped his saccharin-sweetened iced tea through a clear plastic straw, then nodded at a nearby waiter. "That was real good," he said. For most people, this is mundane stuff, the routine rituals of daily life. But for Roky, an Austin rock legend who has struggled for decades with paranoid schizophrenia, these small public moments are big private victories. A little more than a year ago, Roky...