"On the Nature of Man" is an invaluable text for historians of ancient thought, not only as a much contested source of evidence for earlier works now lost, but also as a vivid illustration of intellectual life in the late fourth century. Nemesius, its author, was a Christian bishop who was influenced by the medical works of Galen, as well as the philosophical writings of Plato, Aristotle, and Porphyry; the subject of the text is not only the nature of human beings and their place in the scheme of created things, but also an anthropological study of early Christian theology. A considerable influence on later Byzantine and medieval Latin philosophical theology, "On the Nature of Man "is an essential text for any scholar of the early history of medicine, theological history, and ancient studies.

The relationship between theory and practice, in other words between norms indicated in a text and their extra-textual application, is one of the most fascinating issues in the history and theory of science. Yet this aspect has often been taken for granted and never explored in depth. The essays contained in this volume provide a complex and nuanced discussion of this relationship as it emerges in ancient Greek and Roman culture in a number of fields, such as agriculture, architecture, the art of love, astronomy, ethics, mechanics, medicine, pharmacology. The main focus is on the textuality of processes of the transmission of knowledge and its application in various fields. Given that a text always contains complex and destabilising aspects that cannot be reduced to the specific subject matter it discusses, to what extent can and do ancient texts support extra-textual applicability?