The Mystical Presence (1846), John Williamson Nevin's magnum opus, was an attempt to combat the sectarianism and subjectivism of nineteenth-century American religion by recovering the robust sacramental and incarnational theology of the Protestant Reformation, enriched with the categories of German idealism. In it, he makes the historical case for the spiritual real presence as the authentic Reformed doctrine of the Eucharist, and explains the theological...