"It is not enough to have a good mind; it is more important to use it well" René Descartes was a central figure in the scientific revolution of the seventeenth century. In his Discourse on Method he outlined the contrast between mathematics and experimental sciences, and the extent to which each one can achieve certainty. Drawing on his own work in geometry, optics, astronomy and physiology, Descartes developed the hypothetical method that characterizes modern science, and this soon came to replace the traditional techniques derived from Aristotle. Many of Descartes’ most radical ideas—such as the disparity between our perceptions and the realities that cause them—have been highly influential in the development of modern philosophy. This edition sets the Discourse on Method in the wider context of Descartes’ work, with the Rules for Guiding One’s Intelligence in Searching for the Truth (1628), extracts from The World (1633) and selected letters from 1636-9. A companion volume, Meditations and Other Metaphysical Writings, is also published in Penguin Classics.

Is it possible to be certain of anything? If so, how? The father of modern philosophy and the founder of rational method in philosophical thought, René Descartes (1596–1650) sought the answers to these questions and in doing so, addressed the most important of methods of thinking and understanding truth. In Discourse on Method, he applies a scientific approach to philosophy that comprises four principles: to accept only what reason recognizes as "clear and distinct"; to analyze complex ideas by dividing them into smaller elements; to reconstruct the ideas; and to make accurate and complete enumerations of the data. His Meditations proceed according to this method, exploring the mind/body distinction, the nature of truth and error, the existence of God, and the essence of material things.

A landmark of enlightenment though, HUme's An Enquiry Concerning Human understanding is accompanied here by two shorter works that shed light on it: A Letter from a Gentlemen to His Friend in Edinburgh, hume's response to those accusing him of atheism, of advocating extreme scepticism, and of undermining the foundations of morality; and his Abstract of A Treatise of HUman Nature, which anticipates discussions developed in the Enquiry. In his concise Introduction, Eric Steinberg explores the conditions that led to write the Enquiry and the work's important relationship to Book 1 of Hume's A Treatise of Human Nature.

" Le Discours de la méthode (sous-titré : Pour bien conduire sa raison, et chercher la vérité dans les sciences) est un texte philosophique publié anonymement par René Descartes à Leyde le 8 juin 1637. Il devait originellement servir d'introduction générale aux traités scientifiques écrits par l'auteur (La Dioptrique, Les Météores et La Géométrie). Il s'agissait pour Descartes « d’en dire assez pour faire juger que les nouvelles opinions, qui se verraient dans la Dioptrique et dans les Météores, n’étaient point conçues à la légère. Toutefois, la célébrité du texte est devenue telle, qu’il est désormais souvent publié seul, comme un essai indépendant. Il est reconnu comme l'une des œuvres fondatrices de la philosophie occidentale."

René Descartes was a central figure in the scientific revolution of the seventeenth century. In his Discourse on Method he outlined the contrast between mathematics and experimental sciences, and the extent to which each one can achieve certainty. Drawing on his own work in geometry, optics, astronomy and physiology, Descartes developed the hypothetical method that characterizes modern science, and this soon came to replace the traditional techniques derived from Aristotle. Many of Descartes' most radical ideas - such as the disparity between our perceptions and the realities that cause them - have been highly influential in the development of modern philosophy.

Discours de la methode is a philosophical and autobiographical treatise published by Rene 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.