Dei Filius I:On God, Creation, and Providence Rudi A. Te Velde In this essay, I want to share my impressions of the first chapter of the dogmatic constitution Dei Filius of Vatican I. It begins its declaration of the basic truths of Christian faith in a language which is similar, and probably intended to be similar, to that of a solemn confession of faith: "The holy, catholic, apostolic, and Roman church believes and acknowledges that there is one true living God, creator and lord of heaven and earth."1 It reminds one, in some of its formulations, of the Nicene Creed, but with a remarkable difference: here, in the text of the constitution, the object of the confession is formulated as a proposition about God's existence.2 What is said is not, for example, "I believe in one God, the Father almighty"; but the Church believes and holds it to be true that there exists a God. One can notice a subtle shift from a confession of faith to the proclamation of a (rational) truth. The Pope, gathered with all the bishops of the Church, declares that there exists a God, the one and true living God, a doctrinal statement directed, by implication, against those who dare to deny the existence of God. The opening sentence of chapter 1 corresponds with its canon, which says that, "if anyone denies the one true God, creator and [End Page 823] lord of things visible and invisible: let him be anathema."3 Thus the constitution says that the "one, true living God" of the biblical faith exists, that this is a truth, and that, as consequence, the opposed thesis of atheism is false and must be rejected. Who is asserting this truth? Who is speaking and with which authority? The text leaves no doubt about the speaking subject. It is the Church, entitled to speak with authority about matters of faith, because it is the Roman Church, holy, catholic, and apostolic. The Church speaks, in the person of the pope, the legitimate successor of St. Peter, with authority granted to her by God himself through his Son Jesus Christ. In the preface preceding chapter 1 of the constitution, it is said that the Church is appointed by God to be "mother and mistress of nations." Hence: She can never cease from witnessing to the truth of God . . . and from declaring it, for she knows that these words were directed to her: "My spirit which is upon you, and my words I have put in your mouth, shall not depart out of your mouth from this time forth and for evermore" (Is 59:21).4 This gives the pope, sitting in the chair of Peter, the authority of "teaching and defending Catholic truth and condemning erroneous doctrines."5 And the first thing to be declared, as part of the Church's task to proclaim the Catholic truth to all the nations, is to assert the existence of God against the error of atheism. It is important to understand the genre of a dogmatic constitution. It is a document in which the Church, by mouth of the pope together with the bishops, expounds the basic tenets of Christian teaching. The purpose of a dogmatic constitution is to reaffirm the basic truths of Christian doctrine, to clarify the fundamentals of faith in a message to the world. A constitution may be occasioned by actual developments in the world and society, but it speaks as it were from the standpoint of eternity. In case of the constitution Dei Filius, the addressee is the world of the mid-nineteenth century, a time of dominance of scientific reason, of materialism, naturalism, atheism, and not unimportantly, of current forms of idealistic pantheism (Georg Hegel, Friedrich Schelling, the influence of German Idealism in general); what the constitution especially stands opposed to [End Page 824] is the view of supernatural religion as being irrational. For this purpose it wants to reclaim reason and to overcome the disastrous gap between faith and (modern) rationality. The double program underlying the constitution—teaching the Catholic truth and condemning erroneous doctrines—reminds one of the Summa contra gentiles [SCG] of Thomas Aquinas.6 The...