I think this integrity of the nucleus of the personality is what we would call an aspect of the Self, and it is the essence of Jungian psychology. We must not leave that on any account.
Von Franz identifies psychic integrity with the nucleus of the Self, arguing it is the inviolable core of Jungian praxis — to abandon it under strategic or institutional pressures is to forfeit the entire enterprise.
, Shadow and Evil in Fairy Tales, 1974thesis