Forces, inner or external, facilitated the development of the individual. A distorted pattern of development, a bypass appears. Hence, psychopathological conditions are the outcomes of disturbed growth. Humans can be compared to trees. Yet, deformed and ugly, they still reach their destination, however late and partially.
Psychopathologies are adaptive mechanisms.
They allow the individual to continue to grow around the disturbing factor. There it settles down and continues its more or less linear pattern of growth. Adaptation above all, growth at any price, straight or deformed, it doesn't really matter. My approach is different. I believe that people do engage in linear growth and development and that, these are driven by both internal and external forces.