Bringing together a collection of seven essays on Descartes' method and its relation to his metaphysics, Jean-Luc Marion reads the philosopher's "Discourse on Method" in light of his "Meditations", examining how Descartes' metaphysics changed from one book to the other. Such questions as the status of the ontological argument before and after Descartes are pursued. The essays touch on the major themes of Marion's career, including the connection between metaphysics and method, the concept of God, and the constitution of the thinking subject. In their range, the essays are an introduction to Marion's thought as well as an interpretation of Descartes.