he projected the unconscious into the darkness of matter in order to illuminate it…. While working on his chemical experiments the operator had certain psychic experiences which appeared to him as the particular behavior of the chemical process. Since it was a question of projection, he was naturally unconscious of t
Edinger, quoting Jung, establishes the foundational thesis that the alchemist’s laboratory work was driven by unconscious projection of psychic contents onto matter, rendering those contents experientially accessible but epistemically opaque to their producer.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985thesis