"Who giveth food to all flesh: for his mercy endureth for ever." Psalm 136:25
The "Doctrine of Signatures" is a traditional belief that the physical characteristics of plants and foods (their "signatures") indicate their intended use for healing specific parts of the body. The idea can be traced back to ancient Greece and Rome, but it became especially prominent in medieval Europe and the Renaissance.
Paracelsus (1493–1541), a Swiss physician and alchemist, was one of its strongest advocates. He taught that God had marked plants with signs of their purpose for human use. It was common in herbal medicine traditions across Europe, the Middle East, India, and China, though expressed differently in each culture.




