Marsilio Ficino and De vita: Medicine, Stars and Natural Magic

In 1489 a book appeared in Florence that would become one of the most widely read texts of European magical culture: the De vita libri tres of Marsilio Ficino. Its author, born in Figline Valdarno in 1433, was the translator of Plato and Plotinus, a priest and a man raised among medical books: his father Diotifeci had been physician to Cosimo de' Medici. The treatise, dedicated to Lorenzo the Magnificent, brings these three identities together in a work about the health of scholars, longevity and celestial influences.

Three Books for the Scholar's Life

The first book, De vita sana, is addressed to men of letters, who according to Ficino are more exposed than others to melancholy. The Aristotelian tradition of the Problemata had already linked exceptional talent to black bile; Ficino connects it to the planet Saturn, lord of contemplation but also of sadness. The author considered himself Saturnine by birth, and the book has an autobiographical quality: it is the work of an intellectual who knows the strain of night study and tries to balance its excesses.

The second book, De vita longa, deals with preserving one's strength in old age, according to the Galenic medicine of the time. Its remarks on diet, air and regimen belong to fifteenth-century science and should be read as historical documents, not practical advice. What matters more is the underlying idea: the human body takes part in a cosmic order, and caring for oneself means living in harmony with that order.

The Spirit of the World and the Third Book

The third book, De vita coelitus comparanda, that is “on obtaining life from the heavens”, is the most famous and the most debated. It began as a commentary on a passage in Plotinus's Enneads about the power of statues and temples to draw down a divine presence. Ficino builds on it a theory of natural magic based on the spiritus mundi, an extremely subtle substance that mediates between the world soul and bodies, just as the human spirit mediates between soul and body.

Within this framework music, scents, colours and astrological images were thought able to attune the human spirit to that of a planet. Ficino himself sang Orphic hymns to the lyre, a habit his contemporaries remembered. On engraved images, the talismans of the Arabic and medieval tradition, he is more cautious: he sets out the theories, appeals to ancient authorities and wavers between the hypothesis of a purely natural virtue and the fear of demonic involvement.

Natural Magic, Not Demonic Magic

The distinction is crucial. For Ficino legitimate magic does not command spirits: it merely follows the correspondences already present in nature, like the farmer grafting a plant or the physician choosing a remedy. He calls this magic natural, in contrast to the kind that turns to demons, which the Church condemned. The boundary, however, was thin, and more suspicious readers could not see it at all.

Shortly after publication Ficino had to defend himself against charges of illicit magic, which reached circles of the Roman curia as well. He added an Apologia to the treatise, declaring that he reported the opinions of the ancients without approving all of them and that he submitted to the judgement of the Church. The intervention of influential friends in Rome helped close the matter without consequences for him.

De vita went through many editions in the sixteenth century and was read by physicians, philosophers and students of the occult. Cornelius Agrippa absorbed its theory of spirit and correspondences into the first book of his Occult Philosophy, and through him Ficino's ideas reached much of learned Europe. For understanding Renaissance magic, this treatise remains the most solid starting point.