Another of Jung's works not to be read by the neophyte.
Medieval alchemy is usually treated in histories of science as a dead end in proto-chemistry, charlatanism or just as symptomatic of the fevered imaginations of Christians of the Dark Ages. Jung picks up on the latter theme, but takes their imaginings seriously. Thinking his theories of psychic development (shadow, anima/us, Self) adequate, he characterizes the alchemical work in those terms, seeing it as, on the one hand, further proof of his hypothesis and as, on the other hand, explicable in terms of the hypothesis.
Having taken much advantage of interlibrary loan privileges in college, I was, for two years or so, on top of journal articles about Jung. One thing that struck me was his influence in fields, like folklore studies and the history of religions, concerned with the study of alchemy. I took this as some indication that Jung was causing at least some scholars to look at the phenomenon with new eyes, having found Jung's approach insightful. Indeed, I, too, found Jung making sense of what had hitherto seemed to me to be gibberish.
This is not to say that all self-styled alchemists of the Middle Ages and Renaissance were spirital men seeking wholeness and wisdom by the hypostatization of their own psychic processes into their alembics and retorts. Jung does not emphasize the charlatans and the out-and-out nuts. He does not provide an objective survey description of what has passed as alchemy in times past. He, as always, pans the sand for gold.