All psychopathology is based on interpersonal relationship experience until proven otherwise.
Health is rooted in the group spirit of the family.
The family is usually healthier than any member who might be impaired. First, to intensify the family's organizational and assertive competence so that the family can better handle its own relationship to the community, both as a whole and in reference to a particular member, whether one of the children or one of the parents. Second, to help each family member gain fuller access to more of themselves. This is similar to the over-arching goal of individual psychotherapy. Disease and illness are synonymous in common usage.