The Seba library treats Leper in 6 passages, across 4 authors (including Abraham, Lyndy, John of Damascus, von Franz, Marie-Louise).
In the library
6 passages
panacea or medicine which cures the leprous metals of their corruption and transmutes them into gold is the philosopher's stone or elixir. The Golden Tract said of the Stone: 'it is a subtle spirit which tinges bodies, and cleanses them of their leaprous infirmities'
This passage establishes the leper as the central alchemical metaphor for corrupt matter requiring the philosopher's stone's purifying and transmuting action, with Naaman the leper as the governing biblical proof-text.
Abraham, Lyndy, A Dictionary of Alchemical Imagery, 1998thesis
the cleansing of Naaman the Leper in the river Jordan, the washing of the Ethiopian or black man and the laundering of the dirty linen or sheets
Abraham places the cleansing of Naaman the Leper within a cluster of alchemical images for purification of the prima materia, linking leprosy symbolically to the nigredo's blackness, the Ethiopian, and soiled matter awaiting albedo.
Abraham, Lyndy, A Dictionary of Alchemical Imagery, 1998thesis
The cross-reference entry confirms that the River Jordan is indexed in the alchemical concordance exclusively through the figure of Naaman the leper, cementing leprosy's role as the gateway symbol for alchemical cleansing in the Abrahamic tradition.
Abraham, Lyndy, A Dictionary of Alchemical Imagery, 1998supporting
the fact that the leper heard the 'I will,' belong to His humanity, while the multiplication of the loaves and the purification of the leper belong to His divinity.
John of Damascus deploys the leper's healing as a Christological proof-text, distinguishing the human energy (the spoken will) from the divine energy (the actual purification), so that the leper's cleansing maps the union of the two natures.
John of Damascus, An Exact Exposition of the Orthodox Faith, 2021thesis
As the healing of Naaman shows, the purification is analogous to baptism... the story of Naaman, as we have said, was regarded as a prefiguration of baptism.
Von Franz's commentary on the Aurora Consurgens establishes that the Naaman narrative — in which leprosy is the affliction requiring sevenfold washing — functions as an alchemical and theological type of baptismal purification, integrating patristic and hermetic readings.
von Franz, Marie-Louise, Aurora Consurgens: A Document Attributed to Thomas Aquinas on the Problem of Opposites in Alchemy, 1966supporting
A bare index entry in Freud's Totem and Taboo notes the 'Leper's foe' as a named taboo-category, placing the leper within the anthropological literature on pollution, contagion, and the structuring of social danger that underlies psychoanalytic taboo theory.