This paper argues that an essential aspect of the bilingual oeuvre of Kahlil Gibran (1883-1931), the eminent Arab-American writer, lies in reinventing the religious in and against modernity by reclaiming its Abrahamic, prophetic mode of speech as a poetic form of enunciation. This literary and ethical enterprise is at once post-religious and post-Nietzschean in that it re-imagines the notion of God, in evolutionist terms, as a horizontal form of transcendence beyond the vertical metaphysics of creation, fatherhood and morality. This horizontalization of transcendence reclaims religion, with a particular focus on Islamic-Sufi concepts, beyond monotheism’s worldview and eschatology. Hence the post in post-religious. Gibran’s re-imagining, with and “after” Nietzsche, of God, the self and the world is much occasioned by modernity as it seeks to interrogate and disrupt its calculative and identitarian reason. Ultimately, this Gibranian prophetic vision is a poetic attempt to posit the impossible—not the non-possible, but the utmost horizon of the possible—as an ethical alternative both to traditional morality and to modernity’s calculative and rationalist reason.