As Enlightenment modernity has been gradually but relentlessly dissolving the sacramental sensibilities that are so indispensable to authentic Christian existence, post-Enlightenment postmodernity has been forfeiting the anthropological sensibilities which are enshrined in the formal sacraments and without which civilization will inevitably collapse. Without sacramental sensibilities we lose a sense of grace, and without Anthropological sensibilities we lose a sense of nature – human nature. Whatever particular tasks Christians may be called to undertake, their perennial task is to recognize and bear witness to the relationship between nature and grace – and between this world and the next. The Eucharist is where the Christian both participates in this mystery and is nourished for the work of witnessing to it.