This wide-ranging collection, written in a highly accessible style, studies the close connections that existed between medicine and philosophy throughout antiquity. Medical authors such as the Hippocratic writers, Diocles, Galen, Soranus and Caelius Aurelianus used and elaborated philosophical methods such as causal explanation, definition and division and applied key concepts such as the notion of nature to their understanding of the workings and failings of the human body. At the same time, philosophers such as Plato and Aristotle took a great interest in medical themes and were highly valued for their contributions to medicine. This interaction between doctors and philosophers was particularly striking in their study of the human soul in its relation to the body, as illustrated by their approaches to specific topics such as intellect, sleep and dreams, epilepsy and melancholy, generation and sterility, and diet and drugs.