The Seba library treats Fermentatio in 9 passages, across 6 authors (including Abraham, Lyndy, Samuels, Andrew, von Franz, Marie-Louise).
In the fermentation which quickly follows, the soul and the purified body are chemically and permanently joined together in the coniunctio to create the perfect tincture or elixir. This is the chemical marriage of Sol and Luna.
Abraham defines fermentatio as the stage in which soul and body are permanently reunited following sublimation, producing the tincture through the coniunctio of Sol and Luna.
, A Dictionary of Alchemical Imagery, 1998thesis
Fermentatio suggests a brewing, a mingling of elements which will produce a new substance, different in kind to the original components.
Samuels transposes the alchemical term into psychological register, reading fermentatio as the generative mingling that produces a qualitatively new substance, distinct from its precursors.
, Jung and the Post-Jungians, 1985thesis
Auri aqua est fermentum, et corpora sunt terra eorum, et fermentum huius aquae divinae, est cinis, qui est fermentum fermenti.
Von Franz's citation of Senior identifies the ferment with the divine water and ash — the fermentum fermenti — establishing the paradox that the most elemental residue is simultaneously the most generative substance.
, Aurora Consurgens: A Document Attributed to Thomas Aquinas on the Problem of Opposites in Alchemy, 1966supporting
cibation the nourishment of the philosopher's stone born from the Jungian of Sol and Luna at the chemical wedding, also known as cohobation, imbibation, and sometimes as fermentation.
Abraham notes that cibation is sometimes classified as fermentation, indicating a terminological overlap in which fermentatio encompasses the nourishing and growth of the Stone after its initial birth.
, A Dictionary of Alchemical Imagery, 1998supporting
Coagulatio is generally followed by other processes, most often by mortificatio and putrefactio. What has become fully concretized is now subject to transformation.
Edinger maps the sequential logic of alchemical operations, situating the transformative stages — including fermentatio's preconditions — within a chain that moves from concretization through death toward new life.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985supporting
Mortificatio is the most negative operation in alchemy. It has to do with darkness, defeat, torture, mutilation, death, and rotting. However, these dark images often lead over to highly positive ones — growth, resurrection, rebirth.
Edinger establishes mortificatio as the necessary negative precondition for regenerative operations such as fermentatio, wherein darkness and death prepare the ground for growth.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985supporting
when one employs the askesis of torturing, this mortificatio brings about the complete blackening called nigredo. The life of the material must be wholly and fully mortified, that is, killed dead.
Hillman emphasizes that complete mortification of the prima materia is the operative prerequisite for subsequent transformations, providing the necessary context within which fermentatio can occur.
, Alchemical Psychology, 2010supporting
the opus alchymicum consists of a repeated series of dissolutions and coagulations — the dissolution of the old metal or matter of the Stone into the prima materia and the coagulation of that pure materia into a new and more beautiful form.
Abraham situates fermentatio within the broader rhythmic logic of solve et coagula, underscoring that transformation is a cyclical rather than singular event.
, A Dictionary of Alchemical Imagery, 1998aside
with their mortificatio, interjectio, putrefactio, combustio, incineratio, calcinatio, etc., they are imitating the work of nature. Similarly they liken their labours to human mortality, without which the new and eternal life cannot be attained.
Jung contextualizes the entire sequence of alchemical operations — implicitly including fermentatio — as a mimesis of natural process and a symbolic elaboration of the death-rebirth archetype.
, Collected Works Volume 16: The Practice of Psychotherapy, 1954aside