The archetype is the most ontologically fundamental of all Jung’s psychological concepts, with the advantage of precision and yet by definition partly indefinable and open. Psychic life rests upon these organs; even the self is conceptually subsumed among the archetypes
Hillman argues that the designation ‘archetypal’ is the only adequate name for this psychology because the archetype is Jung’s most fundamental ontological concept, one that subordinates even the self.
, Archetypal Psychology, 1983thesis