The subject over which psychoanalysis operates is different from that of classic psychology, which centers on the study of mental faculties. Subjectivity, based in the consciousness, is where the I is manifest. This way of seeing the subjective, with reference to the predominance of consciousness, was an element of 19th century psychological discourse. From that same vein comes the Cartesian cogitation: "I think, therefore I am". This vision of man yokes the category of existence to the category of thought. The article will discuss the rupture that occurs between the subject of the cogitation and the subject of the unconscious.
Cogitation; Conscious; Unconscious; Subject and language