A lucid introduction to the "existential phenomenology" of Martin Heidegger, particularly as developed in his major work, Being and Time, this work focuses on how Heidegger's ideas bear on the central problem in epistemology--that of how we can have objective knowledge. The author constructs fresh arguments clarifying Heidegger's contribution to the theory of knowledge, and shows why Heidegger deemed misguided the search for knowledge of the way things are in themselves.