Eberhard Jüngel's concern for the world in light of the global ecological crisis, at least as expressed in writing, appears to be limited to a single footnote in his 1977 grand œuvre 'Gott als Geheimnis der Welt'. Reflecting on the relationship between humanity and the world, he writes that "the man" who makes use of the world "is also able simultaneously to supply the world with the possibility of its regeneration for new usage—or, at least, until now, man has been able to do this" (GMW 180). This passage evokes an ominous sense of humanity's failed stewardship over the world, a theme that resonates with Jüngel's broader theological anthropology. A similar concern emerges in Jüngel's diagnosis of humanity as a "security risk", not only to itself but to the world as such. This paper examines how Jüngel's understanding of the human being—as constituted through its being addressed by the Word of God—can illuminate the ways in which humanity fails in its responsibility toward the world. By drawing on central themes in Jüngel's thought, such as self-securing, justification, and the dialectic of lordship and servanthood, this study explores how his anthropology might contribute to a theological vision of ecological responsibility. In doing so, it furthermore aims to reassess Jüngel's concept of 'the world' as the space for human responsibility in light of the divine mystery.