This article aims to think about politics and religion as expressions of man-in-the-world and to understand that such expressions contain numerous ways of presenting themselves, which can be modified based on human experiences and the relationships that man establishes throughout your life. It is within this atmosphere of understanding about politics and religion, seen in a broader and more relational way, that we bring the Austrian philosopher, Martin Buber, to subsidize us on this path of reflection on other ways of (...) facing these themes. It is worth mentioning that we do not intend to present Buber as a model or a hero, but as a person who, despite having been educated within an orthodox religious perspective ; that, even though he had lived through three great wars, he did not succumb to the atrocities and did not close himself within the rituals and dogmas of the religion to which he was inserted since he was a child. On the contrary, he faced reality based on its authenticity, opposed the contents of faith transmitted by the religion in which he was raised and did not bow to the adversities imposed by those who thought differently from him. For Buber, human responsibility is linked to the concrete world that surrounds it. And it is here that the notion of religiosity of that philosopher bequeaths us an important learning: we live immersed in contexts that speak to us and that demand an answer; and we have the opportunity, all the time, to dedicate our attention to these contexts and respond to them in the most unique way possible, driven by an ethics of responsibility. From the reflections presented, we can also say that politics and religion, understood as an expression of man-in-the-world, must be seen as the responsibilities of this singular man. With this, we do not want to say that external conditioning does not influence man in the response he gives to the world, but we want to emphasize that the duality of human existence allows man to respond from all your being or just with fragments of it. Keywords: Religion. Politics. Ethic. Responsibility. Martin Buber. (shrink)