This book explores ancient accounts of the nature of knowledge and belief from Socrates' predecessors up to the Platonists of late antiquity.

Lloyd Gerson is Professor of Philosophy at the University of Toronto. He has published widely on ancient philosophy including most recently Aristotle and Other Platonists (2005) and Knowing Persons: A Study in Plato (2004).

1. Ancient and modern perspectives; 2. The origin of epistemology; 3. Plato; 4. Aristotle; 5. Epicureanism and Stoicism; 6. Skepticism; 7. Plotinus and the Neoplatonic synthesis; 8. Varieties of naturalism; Bibliographical essay.