The initial, evaluation phase of family therapy is of decisive importance within the systemic perspective. Contacting a therapist is always a complex action for a family. The therapist's evaluation must include the possibility that continued contact may influence the family negatively and limit their potential for change. If there appears to be a logical context in which continued therapy can be justified, it will be necessary to use the first three or four sessions to collect essential data and to organize them meaningfully. It is essential to clarify the circular interaction that is maintaining the symptom, as well as the presence of specific family structures and traditions, and the kind of relationships the family attempts to establish with the therapist. On the basis of this information, the therapist can build models of the family's functioning. These models, according to general system theory, make possible logical intervention in complicated, living systems, without distorting them by artificially splitting them into their component parts. Two models that are important to our treatment perspective—the phenomenological and the mythical—are presen