Nemesius' treatise On the Nature of Man is an important text for historians of ancient thought, not only as a much-quarried source of evidence for earlier works now lost, but also as an indication of intellectual life in the late fourth century AD. The author was a Christian bishop; the subject is the nature of human beings and their place in the scheme of created things. The medical works of Galen and the philosophical writings of Plato, Aristotle...