The opus magnum had two aims: the rescue of the human soul and the salvation of the cosmos…. This work is difficult and strewn with obstacles; the alchemical opus is dangerous.
Edinger transmits Jung’s definitive formulation of the opus magnum as a dual project — psychic and cosmic — whose dangers are inaugurated by the encounter with the nigredo.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985thesis