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Discourse on the Method

Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences (French: Discours de la Méthode pour bien conduire sa raison, et chercher la vérité dans les sciences) is a philosophical and autobiographical treatise published by René Descartes in 1637. It is best known as the source of the famous quotation "Je pense, donc je suis" ("I think, therefore I am", or "I am thinking, therefore I exist"),[1] which occurs in Part IV of the work. A similar argument, without this precise wording, is found in Meditations on First Philosophy (1641), and a Latin version of the same statement Cogito, ergo sum is found in Principles of Philosophy (1644).

Author

Discours de la Méthode Pour bien conduire sa raison, et chercher la vérité dans les sciences

1637

Discourse on the Method at Wikisource

Discourse on the Method is one of the most influential works in the history of modern philosophy, and important to the development of natural sciences.[2] In this work, Descartes tackles the problem of skepticism, which had previously been studied by other philosophers. While addressing some of his predecessors and contemporaries, Descartes modified their approach to account for a truth he found to be incontrovertible; he started his line of reasoning by doubting everything, so as to assess the world from a fresh perspective, clear of any preconceived notions.


The book was originally published in Leiden, in the Netherlands. Later, it was translated into Latin and published in 1656 in Amsterdam. The book was intended as an introduction to three works: Dioptrique, Météores, and Géométrie. Géométrie contains Descartes's initial concepts that later developed into the Cartesian coordinate system. The text was written and published in French rather than Latin, the latter being the language in which most philosophical and scientific texts were written and published at that time. Most of Descartes' other works were written in Latin.


Together with Meditations on First Philosophy, Principles of Philosophy and Rules for the Direction of the Mind, it forms the base of the epistemology known as Cartesianism.

Influencing future science[edit]

Skepticism had previously been discussed by philosophers such as Sextus Empiricus, Al-Kindi,[11] Al-Ghazali,[12] Francisco Sánchez and Michel de Montaigne. Descartes started his line of reasoning by doubting everything, so as to assess the world from a fresh perspective, clear of any preconceived notions or influences. This is summarized in the book's first precept to "never to accept anything for true which I did not clearly know to be such". This method of pro-foundational skepticism is considered to be the start of modern philosophy.[13][14]

"The most widely shared thing in the world is good sense, for everyone thinks he is so well provided with it that even those who are the most difficult to satisfy in everything else do not usually desire to have more good sense than they have. It is not likely that everyone is mistaken in this…" (part I, AT p. 1 sq.)

"I know how very liable we are to delusion in what relates to ourselves; and also how much the judgments of our friends are to be suspected when given in our favor." (part I, AT p. 3)

"… I believed that I had already given sufficient time to languages, and likewise to the reading of the writings of the ancients, to their histories and fables. For to hold converse with those of other ages and to travel, are almost the same thing." (part I, AT p. 6)

"Of philosophy I will say nothing, except that when I saw that it had been cultivated for so many ages by the most distinguished men; and that yet there is not a single matter within its sphere which is still not in dispute and nothing, therefore, which is above doubt, I did not presume to anticipate that my success would be greater in it than that of others." (part I, AT p. 8)

"… I entirely abandoned the study of letters, and resolved no longer to seek any other science than the knowledge of myself, or of the great book of the world.…" (part I, AT p. 9)

"The first was to include nothing in my judgments than what presented itself to my mind so clearly and distinctly that I had no occasion to doubt it." (part II, AT p. 18)

"… In what regards manners, everyone is so full of his own wisdom, that there might be as many reformers as heads.…" (part VI, AT p. 61)

"… And although my speculations greatly please myself, I believe that others have theirs, which perhaps please them still more." (part VI, AT p. 61)

Mathesis universalis

Great Conversation

Descartes, René (1637). (in French), BnF Gallica{{cite book}}: CS1 maint: postscript (link)

Discours de la méthode pour bien conduire sa raison et chercher la vérité dans les sciences, plus la dioptrique, les météores et la géométrie

at Project Gutenberg

Discourse on the Method

at Project Gutenberg (édition Victor Cousin, Paris 1824)

Discours de la Méthode

par Adam et Tannery, Paris 1902. (academic standard edition of the original text, 1637), Pdf, 80 pages, 362 kB.

Discours de la méthode

Contains Discourse on the Method, slightly modified for easier reading

Free audiobook at or at audioofclassics

librivox.org