Discours de la méthode is a philosophical and autobiographical treatise published by René Descartes in 1637.It is one of the most influential works in the history of modern philosophy, and important to the evolution of natural sciences. In this work, Descartes tackles the problem of skepticism and modifies it to account for a truth he found to be incontrovertible. It 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.Here Descartes' original French text is reproduced alongside the English translation.