The Nexus Archive
Rationalism · Treatise
Discourse on the Method
by Descartes · The Doubter · Early Modern, 1596-1650
Descartes explains the methodical doubt and disciplined reasoning that launch modern philosophy.
- Intermediate
- 1637
- ~1 hr 45 min read
- 10 chapter guides
- Public domain
Start reading · Read the Part I guide free
Before the text
Editor's Prelude
A Method For Beginning Again
Discourse on the Method is part philosophical treatise, part intellectual autobiography. Descartes looks back on his education, finds inherited learning insufficient, and decides to train his judgment as if he were preparing for dangerous travel.
The work is famous for doubt, but its deeper energy is discipline. Descartes wants a method: divide problems, begin with what is clear, move step by step, and refuse the vanity of pretending to know what has not truly been seen.
The inquiry reaches from private judgment into physics, the body, and the soul, then turns toward the uses of knowledge. Descartes hopes knowledge of nature can make medicine more certain, but he needs more experiments than he can afford and fears the distractions of publication. His final wish is for the quiet needed to continue the work.
The opening pages
Part I: Learning To Judge
PART I
Good sense is, of all things among men, the most equally distributed; for every one thinks himself so abundantly provided with it, that those even who are the most difficult to satisfy in everything else, do not usually desire a larger measure of this quality than they already possess. And in this it is not likely that all are mistaken the conviction is rather to be held as testifying that the power of judging aright and of distinguishing truth from error, which is properly what is called good sense or reason, is by nature equal in all men; and that the diversity of our opinions, consequently, does not arise from some being endowed with a larger share of reason than others, but solely from this, that we conduct our thoughts along different ways, and do not fix our attention on the same objects. For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it. The greatest minds, as they are capable of the highest excellences, are open likewise to the greatest aberrations; and those who travel very slowly may yet make far greater progress, provided they keep always to the straight road, than those who, while they run, forsake it.
For myself, I have never fancied my mind to be in any respect more perfect than those of the generality; on the contrary, I have often wished that I were equal to some others in promptitude of thought, or in clearness and distinctness of imagination, or in fullness and readiness of memory. And besides these, I know of no other qualities that contribute to the perfection of the mind; for as to the reason or sense, inasmuch as it is that alone which constitutes us men, and distinguishes us from the brutes, I am disposed to believe that it is to be found complete in each individual; and on this point to adopt the common opinion of philosophers, who say that the difference of greater and less holds only among the accidents, and not among the forms or natures of individuals of the same species.
I will not hesitate, however, to avow my belief that it has been my singular good fortune to have very early in life fallen in with certain tracks which have conducted me to considerations and maxims, of which I have formed a method that gives me the means, as I think, of gradually augmenting my knowledge, and of raising it by little and little to the highest point which the mediocrity of my talents and the brief duration of my life will permit me to reach. For I have already reaped from it such fruits that, although I have been accustomed to think lowly enough of myself, and although when I look with the eye of a philosopher at the varied courses and pursuits of mankind at large, I find scarcely one which does not appear in vain and useless, I nevertheless derive the highest satisfaction from the progress I conceive myself to have already made in the search after truth, and cannot help entertaining such expectations of the future as to believe that if, among the occupations of men as men, there is any one really excellent and important, it is that which I have chosen.
Chapter guides · 10
Part I
Learning Becomes A Problem
Descartes opens by asking how a good mind can still go wrong.
From education to self-examination
Descartes is not attacking intelligence itself. He is asking why schools, books, travel, and custom can leave a thoughtful person uncertain. The problem is not that people lack minds. It is that the mind needs a better way to judge. He values what he has learned, yet finds neither scholarly disputes nor the customs encountered on his travels a secure foundation for belief. Travel loosens the grip of his own inherited habits. The part ends with his decision to make himself an object of study and choose his course through his own reason.
Part II
The Method Takes Shape
Descartes turns dissatisfaction into four rules for thinking.
Four rules and their first use
The four rules are simple on purpose: accept only what is clear, divide hard problems, move from simple matters to difficult ones, and review carefully. Descartes wants method to discipline the mind before it tries to rebuild knowledge. He begins with mathematical relations, using lines and algebraic signs to bring different problems into a common order. Success there encourages him to seek firmer philosophical foundations. The part closes with deliberate delay: at twenty-three, he decides to prepare through experience and practice before attempting that larger inquiry.
Part III
A Morality For The Road
Descartes needs a way to live while his beliefs are under review.
Part IV
The First Certainty
Doubt reaches its famous turning point.
Part V: Physics And The World
Nature Becomes Order
Descartes moves from method into a mechanical picture of the world.
Part V: Body, Heart, And Blood
The Body As A Machine
The argument turns to anatomy and the circulation of blood.
Part V: Machines, Speech, And Soul
The Soul, United and Immortal
Descartes argues that the soul must be joined to the body while remaining independent of it.
Part VI: Useful Knowledge
Knowledge Should Become Useful
Descartes explains why method matters beyond private certainty.
Part VI: Publication And Objections
Why Publication Feels Dangerous
Descartes weighs whether sharing his work helps or distorts the search.
Part VI: Why He Writes
A Public Method, Not A Finished System
The work closes by explaining why Descartes publishes in this form.
Questions readers ask
- How long does it take to read Discourse on the Method?
- About 1 hr 45 min in total.
- How difficult is Discourse on the Method?
- Intermediate. A mid-length treatise; about 2 hours of reading.
- Which translation is this?
- The John Veitch translation from the French, first published in 1637. The text follows The Method, Meditations and Philosophy of Descartes (Discourse on the Method section) (1901).
- Can I read Discourse on the Method for free?
- Discourse on the Method is part of Nexus Premium, so reading it needs an account and a Premium subscription. The opening above and two chapter guides on this page are free to read.
- How many chapter guides are there?
- 10 chapter guides, written by the Nexus editors. Two open in full here; the rest show their opening line.
About Descartes
René Descartes was a French mathematician and philosopher who spent much of his working life in the Dutch Republic. Seeking secure foundations for knowledge, he developed a method of radical doubt that helped redirect philosophy toward the thinking self.
“What can I know with certainty?”
Descartes helps launch modern philosophy by making the thinking subject the starting point.
Source text: public domain. Chapter guides: original Nexus writing. Discourse on the Method is part of The Nexus Archive, guided Quests through the great works.