The existential philosophy of Jean Paul Sartre postulates that it is in man, and in man alone, that existence precedes essence. In simple terms, Sartre means that man is first and that it is only after his “being” that he becomes this or that. The implication in Sartre's philosophy is that man must create his own essence: it is by being thrown into the world by conscious intention, by loving, struggling, experiencing and being in the world that man is allowed to define itself. However, the definition always remains open: we cannot say that a human is definitively this or that before his death and in fact, it is the ultimate nothingness of death that the being is defined. The concepts Sartre examines in Being and Nothingness exist as part of a philosophical tapestry intended to reveal the nature of being. In many ways, the flow of considerations in Being and Nothingness is part of the examination of a single question: what is the nature of our existence? Sartre attempts to answer his question of existence in various ways, primarily by examining consciousness and its juxtaposition between existence and nothingness. The position in which Sartre places consciousness is forever nuanced by the perception of self and others, applied to ourselves and others, so as to create a continual subject-object relationship through which the being finds for itself- even a place to be. his philosophy is based above all on the innate free will of humanity, and states that it is a by-product of the interaction between being and nothingness. According to Sartre, individuals are free from birth and they continue to define their essence throughout their lives. The nature of an individual is what we have done in the past and what our actions are. In normative or traditional ethics, the notion of God or that of humanity allows us to ignore our responsibility in creating meaning in our lives and to deceive ourselves into believing that we have in one way or another another evades the ambiguity inherent in reality. In all established authoritarian ethical systems, we find a call to an idealized destiny that would be found through the adoption of said ethical system, which allows us to justify almost any means as long as they work in that direction. In doing so, these ethical systems encourage us to sacrifice the present moment, distorting our relationship to time. De Beauvoir, in contrast, insists that ethics must implicitly include an acute awareness of our temporal and interconnected nature, an awareness that requires that our ethical choices support equanimity in the future and the value of the present moment..