Have you ever met someone and felt an instant sense of attraction or repulsion even though you do not know the person? In Depth Psychology this is an unconscious as well as alchemical reaction that is understood as part of psychic projective phenomena of affinity, where a constellated chemistry between two individuals is ignited. This phenomenon was understood by Jung mythically as the unio Mystica, or the union of opposites. This presentation will share how Jung illustrated this psychological understanding of the transference phenomena in alchemical symbolism and illustrations taken from the 16th-century alchemical text, Rosarium Philosophorum. He utilized these illustrations to show the connections that exist between the transformative process shared by alchemy and an analogous transformative process that he discovered in the psychic growth of an individual.