We cannot really know what the word “happiness” means, and still less what authentic values it covers; there is no way to measure the happiness of others, and it is always easy to call a situation that one would like to impose on others happy: in particular, we declare happy those condemned to stagnation, under the pretext that happiness is immobility. This is a notion, then, we will not refer to. The perspective we have adopted is one of existentialist morality. Every subject posits itself as a transcendence concretely, through projects; it accomplishes its freedom only by perpetual surpassing toward other freedoms; there is no other justification for present existence than its expansion toward an indefinitely open future. Every time transcendence lapses into immanence, there is degradation of existence into “in-itself,” of freedom into facticity; this fall is a moral fault if the subject consents to it; if this fall is inflicted on the subject, it takes the form of frustration and oppression; in both cases it is an absolute evil. Every individual concerned with justifying his existence experiences his existence as an indefinite need to transcend himself.

— The Second Sex by Simone de Beauvoir (Page 27)