"As Freud noted: "A thing which has not been understood inevitably reappears; like an unlaid ghost, it cannot rest until the mystery has been resolved and the spell broken." . . . in ambivalent attachment, a mother vacillates inexplicably from being loving and tender to angry and threatening.. Faced with this unpredictable inconsistency, a child tries to appease the mother, anxious to control and monitor her shifting moods."