Paracelsus

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Paracelsus — born Theophrastus Bombastus von Hohenheim in or near Einsiedeln, Switzerland, around 1493 — was the physician and alchemist who tried to tear medicine free of its ancient authorities and ground it instead in observation, chemistry, and a reading of nature as a single living web. The name he is known by was his own coinage or his followers’, meaning something like “beyond Celsus,” the Roman medical writer; the temper it announces ran through his whole career.

He trained as a doctor and worked as one across central Europe, but he treated the inherited canon as an obstacle. Where the universities taught Galen and Avicenna as settled science, he held that disease was not an imbalance of the body’s four humours but the work of specific external agents, to be met with specific remedies — many of them mineral and chemical rather than herbal. He is remembered, accurately, as a founder of medical chemistry: he pushed the preparation of metallic and chemical medicines, weighed the role of dose, and argued that the alchemist’s true office was not gold but cure. The provocation was deliberate. By tradition he is said to have burned the standard medical texts before his students at Basel and lectured in German rather than Latin, and whatever the exact facts, the gesture fits the man the records show.

Beneath the practical reformer lay a cosmology. Paracelsus held that the human being was a microcosm, a small mirror of the whole universe, and that healing meant restoring the correspondence between the two. He taught a doctrine of signatures — that the outer form of a plant or stone discloses its hidden virtue and the ailment it answers — and populated nature with elemental spirits and a vital principle he called the archeus, the inner alchemist that governs each living body. God, for him, had written the world as a book of signs, and the physician’s learning was the reading of it.

This blend of empirical reform and esoteric vision is why he stands in two histories at once. To the history of science he is a turbulent forerunner of chemistry and pharmacology. To the Western esoteric tradition he is a central figure: his followers, the Paracelsians, carried his work into the seventeenth century, where it fed alchemy, the Rosicrucian writings, and the Christian theosophy of Jacob Boehme, and was gathered up again by later occult and theosophical readers. Scholarship has spent a long time disentangling the genuine writings from the flood of works later attributed to him, and the biography is thick with legend; the polemical self-presentation he cultivated did not make the task easier.

He died at Salzburg in 1541. The two readings of him — chemist and magus — were never separate in his own mind, and the difficulty later ages have had in holding them together says as much about those ages as about him.

→ In the library: Steiner — Mystics of the Renaissance (1910), incl. Paracelsus

→ Related: Hermes Trismegistus · Elias Ashmole · Franz Xaver Von Baader