Focusing on anguish as existence as a possibility, Prof. Luiz Carlos Mariano Da Rosa shows that, just as in its emergence it is characterized as something that holds a condition of strangeness, Kierkegaard points out that its emergence consists of a feeling of risk that, in a condition of immanence, imposes itself on every possibility as such as a feeling pure possibility in the face of freedom as a fundamental determination of becoming and the contingent character of the possible, which implies the reality of freedom as a possibility for possibility, which involves two paths, namely, suicide or faith. Thus, based on the phenomenological-ontological-existential principle, the article emphasizes that Heidegger points out that it is nothing other than anguish that establishes and rather inaugurates the opening of the world as a world, which, far from stopping at anguish-with, also implies anguish-why, referring the presence to what the anguish is anxious about, namely, its own power-to-be-in-the-world. And, finally, the article highlights that, having as a theoretical-conceptual principle the perspective that freedom is the being of consciousness, Sartre focuses on the question of whether there is consciousness as a consciousness of freedom, as a presupposition, and what is the form of this consciousness , pointing out that, since anxiety constitutes the locusthat allows the existing human being to be aware of their freedom, it is nothing more than what makes up the modus essendiof freedom asa conscience of being.