Written by the father of modern philosophy, Discourse on Method is a seminal work that outlines Descartes' method of intellectual inquiry. He explores the moral implications of the method, the reasonings by which he deduces that God exists and that man has a soul, and the implications of his philosophy on science. Discourse on Method includes Descartes' most famous and quotable statement: "I think; therefore, I am." This book is must reading for all who wish to have a solid grounding in philosophy and the development of Western thought. The full title of his work is Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences.