This exceptional book examines and explains Plato's answer to the normative question, 'How ought we to live?' It discusses Plato's conception of the virtues; his views about the connection between the virtues and happiness; and the account of reason, desire, and motivation that underlies his arguments about the virtues. Plato's answer to the epistemological question, 'How can we know how we ought to live?' is also discussed. His views on knowledge, belief, and inquiry, and his theory of Forms, a