states of possession ranging in degree from ordinary moods and ‘ideas’ to psychoses… an unknown ‘something’ has taken possession of a smaller or greater portion of the psyche… proclaiming the power of the unconscious over the conscious mind, the sovereign power of possession.
This passage provides Jung’s canonical formulation that unrealized unconscious contents produce states of possession whose scope ranges from mood-disturbance to psychosis, asserting the sovereign autonomy of the unconscious over consciousness.
, Jung on Active Imagination, 1997thesis