Although many have interpreted Luther as “anti-metaphysical” and therefore unconcerned with the question of being, careful scrutiny of his texts shows otherwise. Trained at Erfurt to read Aristotle in the via moderna tradition, Luther did have ontological and semantic convictions that are displayed throughout his work, but especially in his disputations dealing with Trinitarian, Christological and soteriological issues. While rejecting as idolatrous the human attempt to grasp the summum bonum through natural reason, Luther nonetheless assumed that God’s revelation in Christ has ontological implications.
The Finnish School of Luther interpretation, founded by Tuomo Mannermaa, has done a great service for Luther research by highlighting the motifs in Luther of Christ’s real presence in the justified believer and the presence of God’s love in faith. Although the Aristotelian categories available to Luther were inadequate for conceiving the paradoxical presence of the infinite in the finite, Luther did not thereby adopt a relational ontology more characteristic of the late 19th century than of his own time. Instead, he simply regarded as true what his philosophical categories could not fully conceive: just as God became a human being while remaining God, so too do humans become God while remaining human. While the Finnish scholarship highlights Luther’s use of participatio in speaking of the presence of the divine in the justified believer, Luther did not mean thereby that human beings are essentially transformed into God, but rather that they are, in faith, profoundly interpenetrated by the divine.
Luther’s discussion of the nova lingua of theology connects to the “real-ontic” presence of Christ in the believer. As a good nominalist, Luther understood that sentential truth presupposes ontology. While everyday language, the language of philosophy generally, has truth conditions that can be articulated in terms of the existence of particular substances and their particular qualities, things are not so clear for the language of theology that speaks of the Trinity, incarnation, and the presence of God in the world and particularly in the life of the believer. How is this language constituted so that the real presence of the divine can be spoken with meaning and truth? While Luther assumes the extensionalism of nominalism when speaking philosophically, it is not clear that this is the case when he speaks theologically. Luther understands that language itself must be profoundly changed in order to grasp and state the reality of the infinite in the finite. Whether this change can be understood on the horizon of an extensionalist semantics is an open question.
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