QuoteQuest“I think, therefore I am.”
Original (French): Je pense, donc je suis.
— René Descartes, 1637
Verification
VerifiedWording confirmed against a primary source.
This is an English translation. The Latin "cogito, ergo sum" appears later in Principles of Philosophy (1644).
Source
- Title
- Discourse on the Method
- Type
- book · Primary source
- Date
- 1637
- Location
- Part IV
- Held by
- Project Gutenberg
Context
Descartes searches for one belief that cannot be doubted.
What it means
The act of doubting proves the existence of the one doing the doubting.
Cite this source
Descartes, René. (1637). Discourse on the Method. Project Gutenberg. https://www.gutenberg.org/ebooks/59
Check citations against your institution's style guide; some details may be missing.
Provenance: Manually entered from Project Gutenberg.