Personality is the characteristic way in which an individual thinks, feels, and behaves; it accounts for the ingrained behaviour patterns of the individual and is the basis for predicting how the individual will act in particular circumstances. Personality embraces a person’s moods, attitudes, and opinions and is most clearly expressed in interactions with other people. A personality disorder is a pervasive, enduring, maladaptive, and inflexible pattern of thinking, feeling, and behaving that either significantly impairs an individual’s social or occupational functioning or causes the person distress.