Known as Jean-Paul Sartre, was a philosopher, writer, novelist, dramatist, political activist, biographer and French literary critic, exponent of existentialism and humanist Marxism. He was the tenth French writer selected as Nobel Prize for Literature, in 1964, but he rejected it by explaining in a letter.
In a first stage he developed an existentialist philosophy, to which correspond works like El ser y la nada (1943) and El existentialismo es un humanismo (1946). Since he founded the journal Les Temps Modernes in 1945, he became one of the leading theorists of the left. In a second stage he was ascribed to Marxism, whose thought he expressed in The Critique of Dialectical Reason (1960), although he always considered this work as a continuation of Being and Nothingness.
Sartre considers that the human being is "condemned to be free", that is, thrown into action and fully responsible for his life, without excuses. Although it admits some conditioning (cultural, for example), it does not admit determinisms. Conceive human existence as conscious existence. The being of man is distinguished from the being of the thing because it is conscious. Human existence is a subjective phenomenon, in the sense that it is world consciousness and self-consciousness (hence the subjective). Sartre is trained in the phenomenology of Husserl and in the philosophy of Heidegger, of whom he was a disciple. The influence exerted on Sartre by Cartesian rationalism is observed here. At this point he differs from Heidegger, who leaves conscience out of play.
When we are in love we do not see the defects of the person we love. Love blinds us and we become vulnerable and weak. Luckily, over time we can realize that this is happening.