Who is Paracelsus?

Paracelsus, whose full name is Philippus Theophrastus Aureolus Bombastus von Hohenheim, was born in 1493 in Einsiedeln, Switzerland, and died in 1541 in Salzburg. A Swiss physician, philosopher, and alchemist, he is an iconic figure of the Renaissance who revolutionized medicine by introducing the use of chemical substances in treatments, thus laying the foundations of modern toxicology. Above all, Paracelsus also developed a holistic vision of the universe, considering man as a microcosm reflecting the macrocosm. Portrait.

1. The Life Journey of Paracelsus

After the death of his mother during his childhood, Paracelsus was raised by his father, who passed on his knowledge of medicine, alchemy, and natural sciences. In 1502, Wilhelm von Hohenheim settled with his son in Villach, Carinthia, a mining region. There, Paracelsus was exposed to the realities of mining exploitation and miners' occupational diseases, which influenced his understanding of pathologies related to working conditions. This practical experience, combined with his father's teaching, laid the foundation for his future medical approach, combining empirical observation and alchemical knowledge.

After his studies, Paracelsus undertook many travels across Europe, visiting countries such as Sweden, Greece, and Portugal. These journeys allowed him to observe various medical practices and enrich his knowledge.

In 1526, he settled in Strasbourg, then was called to Basel to treat the famous printer Johann Froben, who suffered from gangrene in his leg and was condemned to amputation by his doctors. Paracelsus, through an adapted treatment and his own remedies, prevented the amputation and healed him with as much success as astonishment from his peers. This success earned him an appointment in 1527 as city physician and professor at the University of Basel. But trouble was soon to come.

2. It Is the Dose That Makes the Poison

2.1. The Doctrines of Galen and Avicenna

First, it is necessary to explain the medical context of the time, governed by two doctrines: that of Galen and that of Avicenna.

Galen, a Greek physician of the 2nd century AD, developed the theory of humors, a system that postulated that the human body is governed by four fundamental fluids: blood (vital energy), yellow bile (dynamism and anger), black bile (melancholy), and phlegm (coldness and apathy). These humors were associated with the four elements — air, fire, earth, and water — and conditioned physical and mental health. According to this view, disease resulted from an imbalance of the humors, called "dyscrasia." To restore harmony, Galen recommended treatments such as bloodletting, purges, or specific diets, each adapted to the temperament and supposed needs of the patient.

Source: Sud Ouest

Avicenna, a Persian philosopher and physician of the 11th century, deepened this theory in his major work, The Canon of Medicine. Synthesizing Greek, Persian, Indian, and Arab knowledge, Avicenna developed an even more comprehensive medical system. He considered the humors as decisive but also emphasized the importance of environmental factors such as climate, diet, and emotions. He systematized diagnostic approaches like urine and pulse analysis while enriching the pharmacopoeia with hundreds of natural remedies. His work introduced more precise notions of dosage and combination of medicinal substances.

2.2. Break with Tradition

In the 16th century, European medicine largely relied on these doctrines. Paracelsus, convinced of their inadequacy and of a strong-willed and rebellious character, categorically rejected these teachings. In Basel, in 1527, he performed a symbolic act by publicly burning on St. John's Eve the works of these great medical names in front of his own students. According to him, these methods neglected the realities of diseases and patients.

Paracelsus proposed an empirical approach, rooted in direct observation of symptoms and experimentation. He believed that each disease has a specific remedy in nature, accessible through deep knowledge of plants, minerals, and metals.

Another significant detail: Paracelsus taught in German. This changed a lot because at the time, the "scholarly" language was Latin. All these factors led him to have many detractors, both among physicians and within the Church, labeling him a braggart, a liar, a marginal, or even a drunkard.

2.3. Foundation of Toxicology

This did not stop Paracelsus, who would sign the reason for his fame by revolutionizing the understanding of medicinal substances through the principle that everything can be poison or remedy, depending on the dose. This idea, summed up in his famous phrase "All things are poison, and nothing is without poison; only the dose makes a thing not a poison," paves the way for modern toxicology. Through his work, he demonstrated that even substances perceived as dangerous can become beneficial when properly dosed—and vice versa.

As an example, he used mercury to treat syphilis, a particularly devastating disease in his time, and explored the healing properties of metals such as antimony.

2.4. Alchemical Medicine

Paracelsus developed an innovative discipline called iatrochemistry, which combines alchemy and medicine to analyze the chemical processes of the human body and design appropriate treatments. He considered the body as a chemical system, where diseases are caused by internal imbalances that must be corrected with targeted remedies. Unlike the physicians of his time, he favored individualized treatments, believing that each patient is unique and requires personalized therapy. He opposed the idea of universal prescriptions and advocated for a deep understanding of each individual's temperament and living conditions.

Source: National Geographic

Furthermore, Paracelsus considered nature as a true pharmacy. He used the doctrine of signatures to associate the characteristics of plants and minerals with specific diseases.

3. The Concept of the Three Principles

A convinced alchemist, Paracelsus introduced the concept of the three fundamental principles: sulfur, mercury, and salt. These three symbolic elements replace the classical four elements (earth, air, fire, water) to explain the transformations of matter. Sulfur represents combustibility and the soul, mercury embodies fluidity and the spirit, while salt symbolizes stability and the body. For Paracelsus, these principles are not only alchemical concepts; they also form the basis of medicine, allowing the interpretation of imbalances in the human body as disturbances in these three elements. This alchemical model becomes both a philosophical and medical analytical tool, linking the body and matter to universal laws.

Additionally, his natural philosophy is based on a holistic vision of the universe. Paracelsus considered man as a microcosm, a miniature replica of the macrocosm that is the universe. This universal correspondence means that everything that exists in the outer universe has an equivalent in the human body. This approach integrates the influences of stars, elements, and natural forces into the body's functioning, while emphasizing the role of invisible energies. For Paracelsus, health depends on the harmony between these internal energies and cosmic forces. This viewpoint also influences his medical practice, reinforcing the idea that remedies must resonate with the universe to be effective.

Paracelsus expressed his ideas in major works that combine alchemy, medicine, and philosophy. Among them, Paragranum and Opus Paramirum hold a central place. In Paragranum, he criticizes the foundations of traditional medicine and proposes a new method based on four pillars: philosophy, astronomy, alchemy, and the virtue of the physician. This text constitutes a radical overhaul of medicine, linking it to a deeper understanding of natural and spiritual forces. Opus Paramirum, for its part, explores the causes of diseases and ways to treat them based on alchemical principles. Paracelsus reaffirms his commitment to empirical and experimental medicine while integrating metaphysical elements.

These two works are part of a collection of more than 350 books that Paracelsus is said to have written (230 on philosophy, 40 on medicine, 12 on politics, 7 on mathematics and astrology, 66 on magic and secret arts). Legend or not, we will never know because this count comes from one of his students.

4. A Mysterious End of Life

Paracelsus died on September 24, 1541, in Salzburg, at the age of 48. The circumstances surrounding his death remain mysterious and have given rise to various speculations.

According to some sources, Paracelsus was the victim of an assault during a banquet, orchestrated by medical rivals. During this altercation, he reportedly fell and suffered a fatal head injury. A post-mortem examination revealed a fracture of the temporal bone, suggesting a traumatic injury.

Other hypotheses suggest that Paracelsus died from illness. Shortly before his death, he is said to have bequeathed his belongings to the poor of the city, a gesture interpreted by some as awareness of an imminent end due to a serious condition.

After his death, Paracelsus was buried in the cemetery of Saint Sebastian Church in Salzburg. In 1752, his remains were transferred inside the church, where a commemorative plaque honors his memory.

Another mystery surrounds his name: the most widespread hypothesis suggests that Paracelsus derives from the Latin para meaning "against," "beyond," or "superior to," and Celsus, a 1st-century Roman physician known for his medical writings. Thus, Paracelsus could be translated as "superior to Celsus," a sign of his desire not only to surpass but to contradict traditional medicine.

To conclude and summarize the life and character of Paracelsus (he was never married and had no children): « Nature did not weave me with much subtlety. And it is not customary in my country to use silk threads. We were not raised with figs, mead, or wheat bread; but with cheese, milk, and oat bread: that is not what makes subtle young men. And what we received as children remains attached to us until the end of our days. Compared to delicate people, clean as cats and supremely refined, we seem coarse. And we do not get along well, we who grew up among pine cones, with those who were raised in silk clothes and by women's hands. »