Philosophical Works · Chapter
X explained
Descartes reflects on the nature of self-evident truths, arguing that logical definitions often obscure rather than clarify simple notions.
What happens
Descartes reflects on the nature of self-evident truths, arguing that logical definitions often obscure rather than clarify simple notions. He defends the primacy of the cogito as the first and most certain principle in philosophy, while acknowledging that basic concepts like thought, existence, and certitude are known innately and need not be enumerated.
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
- Cogito Ergo Sum (I Think, Therefore I Am)
Descartes reaffirms the cogito as the first and most certain proposition in orderly philosophizing, foundational to his system.
- Reason and Method
Descartes argues that simple, self-evident notions are obscured by logical definitions and should be recognized as innate rather than acquired through study.
Characters to notice
- René Descartes
Author and philosopher who defends the cogito as the first principle of philosophy and critiques the use of logical definitions for self-evident truths.
Key passages
“I frequently remarked that philosophers erred in attempting to explain, by logical definitions, such truths as are most simple and self-evident; for they thus only rendered them more obscure.”
Philosophers often make simple truths harder to understand by trying to define them logically.
Descartes criticizes the scholastic method of defining basic concepts, advocating instead for direct intuition.
“I think, therefore I am, is of all others the first and most certain which occurs to one philosophizing orderly.”
The statement 'I think, therefore I am' is the first and most certain truth for anyone who philosophizes in an orderly way.
Descartes asserts the cogito as the foundational certainty in his method of doubt.
