I am reading the Routledge Critical Thinkers series on Jacques Lacan, and I have come across this passage about Jean-Paul Sartre:
In an early work entitled Transcendence of the Ego (1934) Sartre distinguished between self-consciousness and the ego. As we saw above, Freud defined the ego as the reasoning faculty of the mind, mediating between unconscious passions and external reality. By extending Heidegger’s notion of the project Sartre suggested that self-consciousness was essentially ‘nothing’, while the ego was an object in the world perceived by the subject. In the 1930s and 1940s Lacan was strongly influenced by these ideas. Sartre’s distinction between subject and ego paved the way for Lacan’s own formulation of the relationship between subject and ego in the mirror stage, while the notions of ‘ex-sistence’ and ‘nothingness’ recur throughout his work.
I have a few questions about this:
The author says that Sartre distinguished between two terms: "self-consciousness" and the "ego". However, a few sentences later he says that Sartre distinguished between "subject" and "ego". What is, in Sartre's understanding, the differences between "self-consciousness", "subject", and "ego"?
Why did Sartre suggest that "self-consciousness was essentially 'nothing'"?
Anything else that you feel would be helpful in wrapping my head around this passage would be appreciated!