“I do not think therefore I am a moustache”
Source: Nausea
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Jean Paul Sartre 321
French existentialist philosopher, playwright, novelist, sc… 1905–1980Related quotes

“I think I am, therefore I am. I think.”
Books, Napalm and Silly Putty (2001)

“I doubt, therefore I think, therefore I am.”
Cogito, ergo sum.
Variant: Dubito, ergo cogito, ergo sum.
(English: "I doubt, therefore I think, therefore I am")

Je pense, donc je suis.
Le Discours de la Méthode (1637)
Variant: I think, therefore I am.

Degrees: Thought Capsules and Micro Tales (1989)

“I think, therefore I am … not a Christian.”
Ich denke, also bin ich kein Christ.
Bissige Aphorismen, S. 35
“I think... therefore I am annoyed.”
Daily strip for November 17, 2007
Bucky Katt
Source: The Eclipse: A Memoir of Suicide (2004), P. 54.