Being-in-the-World: A Commentary on Heidegger's Being and Time, Division IBeing in the World is a guide to one of the most influential philosophical works of this century: Division I of Part One of Being and Time, where Martin Heidegger works out an original and powerful account of being in the world which he then uses to ground a profound critique of traditional ontology and epistemology. Hubert Dreyfus's commentary opens the way for a new appreciation of this difficult philosopher, revealing a rigorous and illuminating