It was eleven years later that Batra and his assistant, Battri, wrote a book on hysteria. In it they explained their theory: Every hysteria is the result of a traumatic experience, one that cannot be integrated into the person’s understanding of the world. The emotions appropriate to the trauma are not expressed in any direct fashion, but do not simply evaporate: They express themselves in behaviors that in a weak, vague way offer a response to the trauma. These symptoms are, in other words, meaningful. When the client can be made aware of the meanings of his or her symptoms (through hypnosis, for example) then the unexpressed emotions are released and so no longer need to express themselves as symptoms. It is analogous to lancing a boil or draining an infection.....Sometimes during "chimney sweeping, " some emotional event was recalled that gave meaning to some particular symptom. The first example came soon after she had refused to drink for a while: She recalled seeing a woman drink from a glass that a dog had just drunk from. While recalling this, she experienced strong feelings of disgust...and then had a drink of water! In other words, her symptom -- an avoidance of water -- disappeared as soon as she remembered its root event, and experienced the strong emotion that would be appropriate to that event. Batra called this catharsis, from the Greek word for cleansing.