This article examines political and liberation theologies as instances of apocalypticism, focusing in the work of Johann Baptist Metz and Jon Sobrino. The first section develops a heuristic framework for identifying and analyzing apocalyptic discourse in general, using the historical work of Bernard McGinn and the rhetorical analysis of Stephen O'Leary. The second section applies this framework to Metz and Sobrino, arguing that their theology is a legitimate, provocative, and instructive instance of apocalyptic discourse today, in part because of the way it integrates apocalyptic eschatology with Christology. In a final section, the intelligibility proper to this apocalyptic discourse is discussed by arguing a correlation with mystical theology with its discursive pair of cataphasis and apophasis. Just as this pair finds its context of meaning in the practice of contemplative prayer, apocalyptic affirmations and the reserve expressed in the eschatological proviso find their context of meaning in the practice of opting for the poor.