The awareness of our situation as one species among many others, like our acknowledgment of other beings—living non-humans, but also the inanimate—in our idea of the world, invites us to reconsider the idea of the dwelling. By moving beyond the dialectic of opening and closing that Heidegger developed in Building, Dwelling, Thinking, philosopher Roland Schaer reintroduces the importance of the living into the very idea of inhabiting. Taking inspiration from the biological concept of “homeostasis,” he emphasizes the importance of the constitution of this “interior environment,” self-produced and self-regulated by the organism. Every living being that has become an environment in itself must nonetheless engage in exchange, become a metabolism, and open up porosities to survive. The figure of the living thus teaches us new forms of hospitality, driven by the vital necessity of making, and being, a habitat for others.