 In the second place, the world includes other people, and as a consequence I am not merely the revealer of the world but something revealed in the projects of those others. Thus, who I am is not merely a function of my own projects but is also a matter of my “being-for-others.” Sartre (1992: 340-58) brings out this form of alienation in his famous analysis of “the Look.” So long as I am engaged unreflectively in a certain practice, I am nothing but that first-person perspective which constitutes things as having a distinctive salience in light of what I am doing. I am absorbed in the world and do not experience myself as having an “outside”; that is, I do not understand my action through some third-person description, as an instance of some general behavior. However, when I become aware of being looked at (that is, when my subjectivity is invaded by the subjectivity of another for whom I am merely part of the world, an item for her projects ), I become aware of having a “nature,” a “character,” of being or doing something. I am not merely looking through a keyhole; I am a voyeur. I cannot originally experience myself as something—a voyeur, for instance. Only the other can give rise to this mode of my being, a mode that I acknowledge as mine (and not merely the other’s opinion of me) in the shame in which I register it. It is because there are others in the world that I can take a third-person perspective on myself, but this reveals the extent to which I am alienated from a dimension of my being: who I am in an objective sense can be originally revealed only by the Other. This has implications for existential social theory (see the section on  Sartre: Existentialism and Marxism  below).