Philosophical Works · Chapter
LXIX explained
Descartes distinguishes between primary qualities (magnitude, figure, motion, etc.) which are clearly perceived in bodies, and secondary qualities (color, pain, smell, taste) which are known only through the senses, arguing that primary qua
What happens
Descartes distinguishes between primary qualities (magnitude, figure, motion, etc.) which are clearly perceived in bodies, and secondary qualities (color, pain, smell, taste) which are known only through the senses, arguing that primary qualities are known with far greater clarity.
Free preview opens on this chapter — companions, themes, and character notes appear beside the text.
Narrative arc
Story tension across the book — this chapter sits in Exposition.
- Setup
- Escalation
- Breaking point
- Aftermath
- Closing
This passage marks the story's dramatic climax because it presents the precise moment of epistemological crisi…
Full beat labels and climax notes unlock in the reader.
Follow the arc while readingThemes in this chapter
- Reason and Method
Descartes applies his method of clear and distinct perception to differentiate between properties known clearly (figure, motion) and those known obscurely (color, pain).
- Skepticism and Certainty
The chapter reinforces the skeptical distinction between what is clearly known through intellect and what is merely sensed, establishing greater certainty for primary qualities.
Characters to notice
- Narrator
The narrator presents the distinction between primary and secondary qualities.
Key passages
“For although when we see a body we are not less assured of its existence from its appearing figured than from its appearing coloured, we yet know with far greater clearness its property of figure than its colour.”
Even though seeing a body's shape gives us no less certainty of its existence than seeing its color, we understand its shape much more clearly than its color.
Descartes emphasizes that figure (a primary quality) is known with greater clarity than color (a secondary quality), despite both providing assurance of the body's existence.
