This paper probes into a dimension of "απειρον" in Anna-Teresa Tymieniecka's conceptualization of "eco-phenomenology" as seen through the lens of an egalitarian ethic and the holistic vision of deep ecologists such as Aldo Leopold, Val Plumwood, Dawne McCance, Max Oelschlaeger, and James Lovelock, who strive to create a free biosphere and eco-system of all the living beings beyond the bounds of humanism and speciesism. We will explore Tymieniecka's and deep ecologists' shared question concerning how to dwell with others on the earth via a backtracking through Plato's χώρα, Husserl's "Ur-Arche," and Heidegger's "region," so as to illumine not only the depth of Tymieniecka's philosophical roots but also the fecund potency of her "eco-phenomenology" for fostering a new conception of justice (dikē) by which a symphony of earthy "life, human life, and post-human life" will be conducted.