Concern demonstrates that man is "thrown into the world," into the midst of other beings, so that in order to project himself he must exist among them and utilize them. Being thrown means, for man, being abandoned to the whirling flow of things in the world and to their determinism.This happens inevitably, according to Martin Heidegger, in inauthentic existence--day-to-day and anonymous existence in which all behaviour is reduced to the same level, made "official," conventional, and insignificant. Chatter, idle curiosity, and equivocation are the characteristics of this existence, in which "One says this" and "One does that" reign undisputed. Anonymous existence amounts to a simple "being together" with others, not a true coexistence, which is obtained only through the acceptance of a common destiny
All of the Existentialists are in agreement on the difficulty of communication; i.e., of well-grounded intersubjective relationships. Karl Jaspers has perhaps been the one to insist most on the relationship between truth and communication. Truths are and can be different from existence. But if fanaticism and dogmatism (which absolutize a historical truth) are avoided on the one hand while relativism and skepticism (which affirm the equivalence of all truths) are avoided on the other, then the only other way is a constant confrontation between the different truths through an always more extended and deepened intersubjective communication.
Jean Paul Sartre, however, denies that there is authentic communication. According to him, consciousness is not only the nullification of things but also the nullification of the other person as other. To look at another person is to make of him a thing. This is the profound meaning of the myth of Medusa. Sexuality itself, which Sartre holds to be an essential aspect of existence, fluctuates between sadism and masochism, in which either the other person or oneself is merely a thing. On this basis, the intersubjective relationship is obviously impossible. (from Encyclopedia Britannica)
