All of these images relate to the symbolism of baptism, which signifies a cleansing, rejuvenating immersion in an energy and viewpoint transcending the ego, a veritable death and rebirth.
Edinger argues that baptism is the archetypal template of solutio, in which ego-dissolution through immersion in a transpersonal energy constitutes genuine psychological death and rebirth.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985thesis