Understanding the Difference of Being: On the Relationship between Metaphysics and Theology

UNDERSTANDING THE DIFFERENCE OF BEING: ON THE RELATIONSHIP BETWEEN METAPHYSICS AND THEOLOGY HELMUT HOPING University of Tubingen, Germany Introduction T:HE PHILOSOPHY of the twentieth century has been o no small extent a critique of metaphysics. Admittedly, philosophical programs have been developed in which the tradition of metaphysics survives. Yet the position of metaphysics in the modern age is disputed even today-as is demonstrated by the recent controversy between Jiirgen Habermas and Dieter Henrich about the possibility of metaphysics after Kant.1 Since 1 See J. Habermas, "Ruckkehr zur Metaphysik: Eine Tendenz in der deutschen Philosophie?" Merkur 439/440, 39 (1985): 898-905; "Metaphysik nach Kant," in K. Cramer et al., eds., Theorie der Subjektivitiit: Dieter Henrich zum 60. Geburtstag (Frankfurt am Main: Suhrkamp, 1978), 425-443. (Both articles are reprinted in J. Habermas, Nachmetaphysisches Denken: Philosophische Aufsiitze [Frankfurt am Main: Suhrkamp, 1988], 18-34; 267-279.) Henrich replied to Habermas's critique in the article "Was ist Metaphysik, was Moderne?: Thesen gegen Jurgen Habermas," Merkur 440, 40 (1986): 495-508 (reprinted in D. Henrich, Konzepte: Essays zur Philosophie der Zeit [Frankfurt am Main: Suhrkamp, 1987], 11-43). On the controversy between Habermas and Henrich, see V. Gerhardt, " Metaphysik und ihre Kritik: Zur Metaphysikdebatte zwischen Jurgen Habermas und Dieter Henrich," Zeitschrift fur philosophische Forschung 42 (1988) : 45-70. Habermas's notion of a " return to metaphysics " undoubtedly has a certain diagnostic value; after all, there has indeed been a recent " discovery " of metaphysics. But Habermas 's criticism of the concept and content of metaphysics-i.e., his thesis that after Kant metaphysics is impossible-not only contradicts the self-understanding of modern philosophy for which metaphysics is essential; it also fails to recognize the metaphysical implications of his own theory of communicative action. See W. C. Zimmerli, "Kommunikation und Metaphysik: Zu den Anfangsgrunden von Habermas ' ' Theorie des kommunikativen Handelns,' " in W. Oelmuller, ed., Metaphysik heute? Kolloquien zur Gegenwartsphilosophie, vol. 10 (Paderborn: SchOningh, 1987), 97-111. 189 190 HELMUT HOPING metaphysics has been indispensable for the self-understanding of philosophy in the modern age up until Hegel, this controversy cannot be reduced to the simple disjunction: either the "end of metaphysics" or the "return to metaphysics "-as Habermas has suggested. The task of philosophy today lies in a metaphysical form of thinking that remains possible even after the critique of metaphysics in Kant and Heidegger. Until recently, the current debate about metaphysics has not been adequately addressed by theology. That is surprising because metaphysics is also indispensable for theology.2 But in the light of the modern critique of metaphysics, the self-understanding of theology and its relationship to metaphysics cannot remain unchanged -just as the self-understanding of metaphysics itself cannot remain unchanged. Yet at least in the realm of Catholic theology , the traditional doctrine of the praeambula fidei has not been abandoned. The aim of the following reflections is to show that the determination of the relationship between metaphysics and theology depends upon how metaphysics understands the " difference of Being" that is given with the manifold of beings. I will introduce four different understandings of the " difference of Being": that which is found in Aquinas's metaphysics; that in Kant's transcendental philosophy; that in Heidegger's thinking of Being; and that in the metaphysics of the absolute projected by Henrich. In some concluding reflections, I will then try to draw out some implications of these understandings of the " difference of Being " for the determination of the relationship between metaphysics and theology. I. Metaphysics of God and Creation : Theological Difference (Aquinas) It is well-known that Thomas Aquinas defines metaphysics as the science of being qua being. The subject-matter that dis2 See W. Kasper, " Zustimmung zum Denken: Von der Unerlasslichkeit der Metaphysik fiir die Sache der Theologie," Tiibinger Theologische Quartalschrift 169 (1989) : 257-271. RELATIONSHIP BETWEEN METAPHYSICS & THEOLOGY 191 tinguishes metaphysics from all other sciences is the ens inquantum est ens 3 or the ens commune.4 Contrary to later concepts of metaphysics, this is not an abstract-universal, for " the term ' a being' [ens], which is applied to a thing by reason of its being [esse], designates the same thing as the term which is applied...