 What Freud calls the unconscious must be redescribed as the paradoxical entanglement of a “total absence of knowledge” combined with a “true understanding” (réelle comprehension) of oneself (1972, Sit. IX: 111). The legitimacy of Sartre’s existential psychoanalysis of consciousness lies in its ability to unveil the original project according to which one chooses (more or less obscurely) to develop the fundamental orientations of their existence. According to Sartre, analysing a human subject and understanding the meaning that orients their existence as a whole requires that we grasp the specific kind of unity that lies behind their various attitudes and conducts. This unity can only appear once we discover the synthetic principle of unification or “totalization” (totalisation) that commands the whole of their behaviours. Sartre understands this totalization as an an-going process that covers the entire course of one’s existence, a process which is constantly reassumed so as to integrate the new developments of this existence. For this reason, this never ending process of totalization cannot be fully self-conscious or the object of reflective self-knowledge. The synthetic principle that makes this totalization possible is identified by Sartre in terms of fundamental choice: existential psychoanalysis describes human subjects as synthetic totalities in which every attitude, conduct, or behaviour finds its meaning in relation to the unity of a primary choice, which all of the subject’s behaviour expresses in its own way.