Full Idea
"I think therefore I am" is the absolute truth of consciousness as it attains to itself.
Gist of Idea
"I think therefore I am" is the absolute truth of consciousness
Source
comment on René Descartes (Meditations [1641], §2) by Jean-Paul Sartre - Existentialism and Humanism p.44
Book Reference
Sartre,Jean-Paul: 'Existentialism and Humanism', ed/tr. Mairet,Philip [Methuen 1980], p.44