I speak of esse in anima, the only form of being we can experience directly... What indeed is reality if it is not a reality in ourselves, an esse in anima? Living reality is the product neither of the actual, objective behaviour of things nor of the formulated idea exclusively, but rather of the combination of both
Jung's own canonical statement of esse in anima, defining it as the psyche's creative synthesis of objective fact and formulated idea into the only reality directly accessible to experience.
, Anima: An Anatomy of a Personified Notion, 1985thesis