" Because borderlines never really get better. The best you can do is help them coast, without getting sucked into their pathology. At first glance they look normal, sometimes even supernormal, holding down high-pressure jobs and excelling. But they walk a constant tightrope between madness and sanity, unable to form relationships, incapable of achieving insight, never free from a deep, corroding sense of worthlessness and rage that spills over, inevitably, into self-destruction. They’re the chronically depressed, the determinedly addictive, the compulsively divorced, living from one emotional disaster to the next. "
― Jonathan Kellerman , Silent Partner (Alex Delaware, #4)