These torturing incursions of soul into spirit and spirit into soul are the syzygy in action. This is the coniunctio. Because of the anima-animus syzygy, psychology cannot omit spirit from its purview.
Hillman identifies the syzygy as the living dynamic of coniunctio — the mutual invasion of soul by spirit and spirit by soul — and argues this makes spirit indispensable to psychological inquiry.
, Anima: An Anatomy of a Personified Notion, 1985thesis