Known as the “Father of Medicine”, Hippocrates was then as now a very famous healer [physician in the modern sense was probably unknown in ancient Greece] of the ancient Greek world. He taught medicine at Cos, and was an Asclepiad, which has been defined by historians as either a guild of physicians or simply a term applied to all physicians of his day. His major contribution to the field of medicine was to separate it from its former association with magic by no longer accepting that the gods are responsible for all disease. Instead, Hippocrates allowed observation, rationality and his own genuine respect for his patients to guide his practice (Garrison 94). Using the scientific method, he carefully recorded his patient’s symptoms and responses to treatments, and used the data gathered to evaluate and prescribe the most successful regimens. His prestige as a great medical practitioner, educator, and author helped spread these ideals of rational medicine throughout the ancient world

Could you help me understand the meaning of RATIONAL medicine, please?


'rational' is used here to mean logical and based on evidence such as symptoms and known cures. It's used in opposition to 'superstitious', which means based on the interpretation of such things as the positions of the planets or the patterns formed in the ashes of burnt sacrifices (animals).