About the red only this: Whatever its many names and equations, it indicates the inseparability of visible and invisible, psyche and cosmos, a unus mundus. It requires the most intense heat: "The spirit is heat."[38] The operations coincident to the reddening are exaltation, multiplication, and projection, according to the fifteenth-century English alchemist George Ripley. These expansions together perform the tincturing, staining all things as the sun shines everywhere. The image of the King dominates. The King as a political figure redresses the balance of the introverted process that has led to his crowning, now toward the polis, the city on earth. The rubedo as a purple-red is also called in Greek terms the iosis, which means poisoning. It would seem that the rubedo deconstructs the very matter from which the King arises. "All corruption of matter is marked by deadly poison."[39] The Ouroboros, which can also indicate the rubedo, at this red juncture signifies a final dissolution of sunlit consciousness and all distinctions - all the stages, phases, operations, and colors. It is a moment of the rotatio, a turning and turning like the cosmos itself, requiring endless numbers of eyes to see with, like the King seeing and being seen by each one in the realm. The work is over; we no longer work at consciousness, develop ourselves, or possess a distinct grid by means of which we recognize where we are, how we are, maybe even who we are. "The dissolution of Sol should be effected by Nature, not by handiwork," concludes Figulus.
— James Hillman
Hillman is describing the moment consciousness stops working on itself — and that is the most disorienting thing alchemy has to say. Everything the work built toward: the discriminating eye, the stages carefully ordered, the grid by which we know where we are and who we are — all of it dissolves into the rotatio. Not as failure. As completion.
The rubedo is purple-red because it poisons. *Iosis* carries that ambiguity without flinching: the crowning and the corruption are the same event. What the King embodies at his moment of tincturing everything, shining everywhere, is not a triumph of development but a dissolution of the one who developed. Figulus says it plainly — Sol must be dissolved by Nature, not by handiwork. The soul cannot maneuver its way into this. Effort, vigilance, accumulation of insight: these belong to the earlier operations. The rubedo announces their end.
This is where depth psychology parts company with virtually every self-improvement framework that borrows its vocabulary. Individuation gets narrated as growth, as the progressive acquisition of wholeness — expansive logic dressed in Jungian language. But what Hillman reads in the rubedo is not acquisition. It is the Ouroboros at the red juncture: the mouth taking in its own tail, all distinctions returning to the turn, the King now visible only through each eye in the realm, no longer seeing with his own.
James Hillman·Alchemical Psychology·2010