The treatment of a psychological disorder is often long. Yet to paraphrase Freud's comment of a hundred years ago, it would be nice to have a rapid cure for severe medical problems too. But the problems of living do differ. A traumatic event troubling a previously healthy person may require only one to two months of therapy but not those reflecting a lifetime of distress.
For these sufferers it is important to intermittently relate their current (adult) symptoms to the early developmental experiences which produced them, as can result when one lacked a "good enough" parenting. This enables the patient to understand their life, why they repeat their mistakes. It also reduces their fear from believing that anxiety and depression are magical and may invade their consciousness at any time. All symptoms have a logical reason for existing. Learning their unconscious cause reduces the terror they inspire and gives hope.