The Discourse on the Method (French: Discours de la methode) is a philosophical and autobiographical treatise published by Rene Descartes in 1637. Its full name is Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences. The Discourse on The Method is best known as the source of the famous quotation "Je pense, donc je suis" ("I think, therefore I am"), which occurs in Part IV of the work. (The similar statement in Latin, Cogito ergo sum, is sometimes used.) Meditations on First Philosophy (subtitled In which the existence of God and the immortality of...