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Medicine, Heaven, and the Rhythm of Creation: Reflections on Natural Astrology
For most of history, studying the stars has been a science rather than a mysterious art. The same doctors who treated the sick and studied anatomy also charted the movements of the moon and planets. According to the medieval healer, heaven and body were woven together in a wonderful pattern of divine design. Understanding this pattern was seen as showing respect for the Creator, not submission.
Doctors as astrologers
In the great universities of the Middle Ages – Paris, Bologna, Oxford – medical students studied both astronomy and astrology. Astronomy meant the size and geometry of the sky: how the moon moved, how eclipses worked, and how to calculate the calendar. Astrology meant understanding how these celestial rhythms affected life on earth—weather, crops, tides, and the human body.
It was believed that the body itself reflects the cosmos. Medieval manuscripts often show the “Zodiac Man”, which is represented by twelve signs: Aries rules the head, Taurus the neck, Lion the heart, Fish at the feet.
The monthly journey of the moon through these signs helped doctors determine the timing of treatment. They believed that when the moon passed through a sign that ruled a certain part of the body, that area was more “sensitive” – so it was better to avoid operations or bleeding.
It was not superstition for them, but science – an attempt to work with the rhythms of nature, not against them. Their calendars of moon phases and star signs were as useful a tool for health as stethoscopes are today.
Zodiac Man combines with Phlebotomy Man to show when and where to bleed. From John Foxton’s Liber Cosmographiae, 1408.
Moon and natural order
The moon has a special place, especially in medicine. It is believed that its phases affect bodily fluids as they affect the flow of water. Doctors used the lunar calendar to mark important days during illness and recovery. Even Christian scholars such as Thomas Aquinas recognized that the heavens could influence natural things—the weather, the seasons, even the temperament of the body—and argued that the stars could not control the human spirit and will.
Thus the “science of astrology” in the Middle Ages was not divination, but a form of natural philosophy—the study of the order of creation under God.
Faith, Science and Symbol
As a recently converted Catholic, I find this historical perspective deeply moving. It reminds us that faith and science are never enemies. The medieval physician looked at the stars and saw not fearful forces, but language through which God revealed His order and harmony.
My interest in the moon and zodiac follows the same path – not divination, but contemplation. I no longer write “forecasts” or prophecies. Instead, I use the lunar cycles as an opportunity to reflect on health, rhythm, and balance. The full moon and new moon are natural signs in time: moments to stop, breathe, and notice how creation itself moves through periods of light and rest.
Forward: The Moon as a Balance Teacher
If I were to go back to making lunar reports, I would focus on what I call natural astrology – observing the relationship between the heavens and nature, assigning them authority over destiny. Each full moon is a reflection of the rhythm of life: when to slow down, when to move, when to rest, when to create.
I also share the story of how ancient and medieval healers used the time of the Moon not as medical advice, but to understand how people tried to live in harmony with nature. My hope is to connect science, spirituality, and history: to show how moonlight guides awareness, not prophecy. Apparently, exercising was never a sin medical astrology, that may be the direction I take with this website in the future.
Psalm 19 declares, “The heavens declare the glory of God, and the heavens declare the work of his hands.” That verse embodies the essence of this work. The moon and stars are not omens, but reflect the natural rhythms of life and our body’s deep connection with the elements. They remind us that even as we attain divinity, we belong to the wonders of the natural world.
