As to the division of the history of dogma, it consists of two main parts. The first has to describe the origin of dogma, that is, of the Apostolic Catholic system of doctrine based on the foundation of the tradition authoritatively embodied in the creeds and Holy scripture, and extends to the beginning of the fourth century. This may be conveniently divided into two parts, the first of which will treat of the preparation, the second of the establishment of the ecclesiastical doctrine of faith. The second main part, which has to portray the development of dogma, comprehends three stages. In the first stage the doctrine of faith appears as Theology and Christology. The Eastern Church has never got beyond this stage, although it has to a large extent enriched dogma ritually and mystically (see the decrees of the seventh council). We will have to shew how the doctrines of faith formed in this stage have remained for all time in the Church dogmas κατ' εξοχην. The second stage was initiated by Augustine. The doctrine of faith appears here on the one side completed, and on the other re-expressed by new dogmas, which treat of the relation of sin and grace, freedom and grace, grace and the means of grace. The number and importance of the dogmas that were, in the middle ages, really fixed after Augustine's time, had no relation to the range and importance of the questions which they raised, and which emerged in the course of centuries in consequence of advancing knowledge, and not less in consequence of the growing power of the Church. Accordingly, in this second stage which comprehends the whole of the middle ages, the Church as an institution kept believers together in a larger measure than was possible to dogmas. These in their accepted form were too poor to enable them to be the expression of religious conviction and the regulator of Church life. On the other hand, the new decisions of Theologians, Councils and Popes, did not yet possess the authority which could have made them incontestable truths of faith. The third stage begins with the Reformation, which compelled the Church to fix its faith on the basis of the theological work of the middle ages. Thus arose the Roman Catholic dogma which has found in the Vatican decrees its provisional settlement. This Roman Catholic dogma, as it was formulated at Trent, was moulded in express opposition to the Theses of the Reformers. But these Theses themselves represent a peculiar conception of Christianity, which has its root in the theology of Paul and Augustine, and includes either explicitly or implicitly a revision of the whole ecclesiastical tradition, and therefore of dogma also. The History of Dogma in this last stage, therefore, has a twofold task. It has, on the one hand, to present the Romish dogma as a product of the ecclesiastical development of the middle ages under the influence of the Reformation faith which was to be rejected, and on the other hand, to portray the conservative new formation which we have in original Protestantism, and determine its relation to dogma. A closer examination, however, shews that in none of the great confessions does religion live in dogma, as of old. Dogma everywhere has fallen into the background; in the Eastern Church it has given place to ritual, in the Roman Church to ecclesiastical instructions, in the Protestant Churches, so far as they are mindful of their origin, to the Gospel. At the same time, however, the paradoxical fact is unmistakable that dogma as such is nowhere at this moment so powerful as in the Protestant Churches, though by their history they are furthest removed from it. Here, however, it comes into consideration as an object of immediate religious interest, which, strictly speaking, in the Catholic Church is not the case.[4] The Council of Trent was simply wrung from the Romish Church, and she has made the dogmas of that council in a certain sense innocuous by the Vatican decrees.[5] In this sense, it may be said that the period of development of dogma is altogether closed, and that therefore our discipline requires a statement such as belongs to a series of historical phenomena that has been completed.

3. The church has recognised her faith, that is religion itself, in her dogmas. Accordingly, one very important business of the History of Dogma is to exhibit the unity that exists in the dogmas of a definite period, and to shew how the several dogmas are connected with one another and what leading ideas they express. But, as a matter of course, this undertaking has its limits in the degree of unanimity which actually existed in the dogmas of the particular period. It may be shewn without much difficulty, that a strict though by no means absolute unanimity is expressed only in the dogmas of the Greek Church. The peculiar character of the western post-Augustinian ecclesiastical conception of Christianity, no longer finds a clear expression in dogma, and still less is this the case with the conception of the Reformers. The reason of this is that Augustine, as well as Luther, disclosed a new conception of Christianity, but at the same time appropriated the old dogmas.[6] But neither Baur's nor Kliefoth's method of writing the history of dogma has done justice to this fact. Not Baur's, because, notwithstanding the division into six periods, it sees a uniform process in the development of dogma, a process which begins with the origin of Christianity and has run its course, as is alleged, in a strictly logical way. Not Kliefoth's, because, in the dogmas of the Catholic Church which the East has never got beyond, it only ascertains the establishment of one portion of the Christian faith, to which the parts still wanting have been successively added in later times.[7] In contrast with this, we may refer to the fact that we can clearly distinguish three styles of building in the history of dogma, but only three; the style of Origen, that of Augustine, and that of the Reformers. But the dogma of the post-Augustinian Church, as well as that of Luther, does not in any way represent itself as a new building, not even as the mere extension of an old building, but as a complicated rebuilding, and by no means in harmony with former styles, because neither Augustine nor Luther ever dreamed of building independently.[8] This perception leads us to the most peculiar phenomenon which meets the historian of dogma, and which must determine his method.

Dogmas arise, develop themselves and are made serviceable to new aims; this in all cases takes place through Theology. But Theology is dependent on innumerable factors, above all, on the spirit of the time; for it lies in the nature of theology that it desires to make its object intelligible. Dogmas are the product of theology, not inversely; of a theology of course which, as a rule, was in correspondence with the faith of the time. The critical view of history teaches this: first we have the Apologists and Origen, then the councils of Nice and Chalcedon; first the Scholastics, then the Council of Trent. In consequence of this, dogma bears the mark of all, the factors on which the theology was dependent. That is one point. But the moment in which the product of theology became dogma, the way which led to it must be obscured; for, according to the conception of the Church, dogma can be nothing else than the revealed faith itself. Dogma is regarded not as the exponent, but as the basis of theology, and therefore the product of theology having passed into dogma limits, and criticises the work of theology both past and future.[9] That is the second point. It follows from this that the history of the Christian religion embraces a very complicated relation of ecclesiastical dogma and theology, and that the ecclesiastical conception of the significance of theology cannot at all do justice to this significance. The ecclesiastical scheme which is here formed and which denotes the utmost concession that can be made to history, is to the effect that theology gives expression only to the form of dogma, while so far as it is ecclesiastical theology, it presupposes the unchanging dogma, i.e., the substance of dogma. But this scheme, which must always leave uncertain what the form really is, and what the substance, is in no way applicable to the actual circumstances. So far, however, as it is itself an article of faith it is an object of the history of dogma. Ecclesiastical dogma when put on its defence must at all times take up an ambiguous position towards theology, and ecclesiastical theology a corresponding position towards dogma; for they are condemned to perpetual uncertainty as to what they owe each other, and what they have to fear from each other. The theological Fathers of dogma have almost without exception failed to escape being condemned by dogma, either because it went beyond them, or lagged behind their theology. The Apologists, Origen and Augustine may be cited in support of this; and even in Protestantism, mutatis mutandis, the same thing has been repeated, as is proved by the fate of Melanchthon and Schleiermacher. On the other hand, there have been few theologians who have not shaken some article of the traditional dogma. We are wont to get rid of these fundamental facts by hypostatising the ecclesiastical principle or the common ecclesiastical spirit, and by this normal hypostasis, measuring, approving or condemning the doctrines of the theologians, unconcerned about the actual conditions and frequently following a hysteron-proteron. But this is a view of history which should in justice be left to the Catholic Church, which indeed cannot dispense with it. The critical history of dogma has, on the contrary, to shew above all how an ecclesiastical theology has arisen; for it can only give account of the origin of dogma in connection with this main question. The horizon must be taken here as wide as possible; for the question as to the origin of theology can only be answered by surveying all the relations into which the Christian religion has entered in naturalising itself in the world and subduing it. When ecclesiastical dogma has once been created and recognised as an immediate expression of the Christian religion, the history of dogma has only to take the history of theology into account so far as it has been active in the formation of dogma. Yet it must always keep in view the peculiar claim of dogma to be a criterion and not a product of theology. But it will also be able to shew how, partly by means of theology and partly by other means—for dogma is also dependent on ritual, constitution, and the practical ideals of life, as well as on the letter, whether of Scripture, or of tradition no longer understood—dogma in its development and re-expression has continually changed, according to the conditions under which the Church was placed. If dogma is originally the formulation of Christian faith as Greek culture understood it and justified it to itself, then dogma has never indeed lost this character, though it has been radically modified in later times. It is quite as important to keep in view the tenacity of dogma as its changes, and in this respect the Protestant way of writing history, which, here as elsewhere in the history of the Church, is more disposed to attend to differences than to what is permanent, has much to learn from the Catholic. But as the Protestant historian, as far possible, judges of the progress of development in so far as it agrees with the Gospel in its documentary form, he is still able to shew, with all deference to that tenacity, that dogma has been so modified and used to the best advantage by Augustine and Luther, that its Christian character has in many respects gained, though in other respects it has become further and further alienated from that character. In proportion as the traditional system of dogmas lost its stringency it became richer. In proportion as it was stripped by Augustine and Luther of its apologetic philosophic tendency, it was more and more filled with Biblical ideas, though, on the other hand, it became more full of contradictions and less impressive.

This outlook, however, has already gone beyond the limits fixed for these introductory paragraphs and must not be pursued further. To treat in abstracto of the method of the history of dogma in relation to the discovery, grouping and interpretation of the material is not to be recommended; for general rules to preserve the ignorant and half instructed from overlooking the important, and laying hold of what is not important, cannot be laid down. Certainly everything depends on the arrangement of the material; for the understanding of history is to find the rules according to which the phenomena should be grouped, and every advance in the knowledge of history is inseparable from an accurate observance of these rules. We must, above all, be on our guard against preferring one principle at the expense of another in the interpretation of the origin and aim of particular dogmas. The most diverse factors have at all times been at work in the formation of dogmas. Next to the effort to determine the doctrine of religion according to the finis religionis, the blessing of salvation, the following may have been the most important. (1) The conceptions and sayings contained in the canonical scriptures. (2) The doctrinal tradition originating in earlier epochs of the church, and no longer understood. (3) The needs of worship and organisation. (4) The effort to adjust the doctrine of religion to the prevailing doctrinal opinions. (5) Political and social circumstances. (6) The changing moral ideals of life. (7) The so-called logical consistency, that is the abstract analogical treatment of one dogma according to the form of another. (8) The effort to adjust different tendencies and contradictions in the church. (9) The endeavour to reject once for all a doctrine regarded as erroneous. (10) The sanctifying power of blind custom. The method of explaining everything wherever possible by "the impulse of dogma to unfold itself," must be given up as unscientific, just as all empty abstractions whatsoever must be given up as scholastic and mythological. Dogma has had its history in the individual living man and nowhere else. As soon as one adopts this statement in real earnest, that mediæval realism must vanish to which a man so often thinks himself superior while imbedded in it all the time. Instead of investigating the actual conditions in which believing and intelligent men have been placed, a system of Christianity has been constructed from which, as from a Pandora's box, all doctrines which in course of time have been formed, are extracted, and in this way legitimised as Christian. The simple fundamental proposition that that only is Christian which can be established authoritatively by the Gospel, has never yet received justice in the history of dogma. Even the following account will in all probability come short in this point; for in face of a prevailing false tradition the application of a simple principle to every detail can hardly succeed at the first attempt.

Explanation as to the Conception and Task of the History of Dogma.

No agreement as yet prevails with regard to the conception of the history of dogma. Münscher (Handbuch der Christl. D.G. 3rd ed. I. p. 3 f.) declared that the business of the history of dogma is "To represent all the changes which the theoretic part of the Christian doctrine of religion has gone through from its origin up to the present, both in form and substance," and this definition held sway for a long time. Then it came to be noted that the question was not about changes that were accidental, but about those that were historically necessary, that dogma has a relation to the church, and that it represents a rational expression of the faith. Emphasis was put sometimes on one of these elements and sometimes on the other. Baur, in particular, insisted on the first; V. Hofmann, after the example of Schleiermacher, on the second, and indeed exclusively (Encyklop. der theol. p. 257 f.: "The history of dogma is the history of the Church confessing the faith in words"). Nitzsch (Grundriss der Christl. D.G. I. p. 1) insisted on the third: "The history of dogma is the scientific account of the origin and development of the Christian system of doctrine, or that part of historical theology which presents the history of the expression of the Christian faith in notions, doctrines and doctrinal systems." Thomasius has combined the second and third by conceiving the history of dogma as the history of the development of the ecclesiastical system of doctrine. But even this conception is not sufficiently definite, inasmuch as it fails to do complete justice to the special peculiarity of the subject.

Ancient and modern usage does certainly seem to allow the word dogma to be applied to particular doctrines, or to a uniform system of doctrine, to fundamental truths, or to opinions, to theoretical propositions or practical rules, to statements of belief that have not been reached by a process of reasoning, as well as to those that bear the marks of such a process. But this uncertainty vanishes on closer examination. We then see that there is always an authority at the basis of dogma, which gives it to those who recognise that authority the signification of a fundamental truth "quæ sine scelere prodi non poterit" (Cicero Quæst. Acad. IV. 9). But therewith at the same time is introduced into the idea of dogma a social element (see Biedermann, Christl. Dogmatik. 2. Edit. I. p. 2 f.); the confessors of one and the same dogma form a community.

There can be no doubt that these two elements are also demonstrable in Christian dogma, and therefore we must reject all definitions of the history of dogma which do not take them into account. If we define it as the history of the understanding of Christianity by itself, or as the history of the changes of the theoretic part of the doctrine of religion or the like, we shall fail to do justice to the idea of dogma in its most general acceptation. We cannot describe as dogmas, doctrines such as the Apokatastasis, or the Kenosis of the Son of God, without coming into conflict with the ordinary usage of language and with ecclesiastical law.

If we start, therefore, from the supposition that Christian dogma is an ecclesiastical doctrine which presupposes revelation as its authority, and therefore claims to be strictly binding, we shall fail to bring out its real nature with anything like completeness. That which Protestants and Catholics call dogmas, are not only ecclesiastical doctrines, but they are also: (1) theses expressed in abstract terms, forming together a unity, and fixing the contents of the Christian religion as a knowledge of God, of the world, and of the sacred history under the aspect of a proof of the truth. But (2) they have also emerged at a definite stage of the history of the Christian religion; they show in their conception as such, and in many details, the influence of that stage, viz., the Greek period, and they have preserved this character in spite of all their reconstructions and additions in after periods. This view of dogma cannot be shaken by the fact that particular historical facts, miraculous or not miraculous are described as dogmas; for here they are regarded as such, only in so far as they have got the value of doctrines which have been inserted in the complete structure of doctrines and are, on the other hand, members of a chain of proofs, viz., proofs from prophecy.