the mundificatio, and, just as this is the necessary condition for the return of the soul to the body, so the body is necessary if the unconscious is not to have destructive effects on the ego-consciousness
Jung defines mundificatio as the psychological differentiation of the ego from unconscious contamination, arguing it is the indispensable precondition for grounded integration rather than destructive inflation.
, Collected Works Volume 16: The Practice of Psychotherapy, 1954thesis