Unlike many people afflicted with other mental disorders—such as schizophrenia, bipolar (manic-depressive) disease, alcoholism, or eating disorders—the borderline can usually function extremely well in work and social situations without appearing overtly pathological. Indeed, some of the hallmarks of borderline behavior are the sudden, unpredictable eruptions of anger, extreme suspiciousness, or suicidal depression from someone who has appeared so “normal.”
