The situation of religious institutional diminishment in many Western countries requires new approaches to the proclamation of Christian faith. As a response to these complexities, Karl Rahner suggested a “mystagogic” approach as a future pathway for theology. A mystagogical approach seeks modes of spiritual and theological conversation which engage the religious imagination and draws upon personal experiences of transcendence and religious sensibility. In Karl Rahner, Culture and Evangelization: New Approaches in an Australian Setting, Anthony Mellor develops a reflective process of contemporary “mystagogia” describing how different fields of engagement require different patterns of mystagogical conversation. While focussing on the Australian setting, these differentiate arenas of engagement are also applicable to other cultural settings and offer fresh perspectives for evangelisation today.