Graham Priest presents a new, expanded edition of his highly original exploration of the nature and limits of thought. Drawing on recent developments in the field of logic, Priest shows that the description of such limits leads to contradiction, and argues that these contradictions are in fact true. Beginning with an analysis of the way in which these limits arise in pre-Kantian philosophy, Priest goes on to illustrate how the nature of these limits was theorized by Kant and Hegel. He offers new interpretations of Berkeley's master argument for idealism and Kant on the antinomies. He explores the paradoxes of self-reference, and provides a unified account of the structure of such paradoxes. The book goes on to trace the theme of the limits of thought in modern philosophy of language, including discussions of the ideas of Wittgenstein and Derrida. The second edition includes new chapters on Heidegger and Nagarjuna, as well as reflections on reactions to the first edition. This clear, provocative, and systematic work offers a radically different approach to philosophy and logic.