St. John Henry Newman
Grammar of Assent
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Belief in the Holy Trinity
Now let us observe what is not in that exposition;— there are no scientific terms in it. I will not allow that "Personal" is such, because it is a word in common use, and though it cannot mean precisely the same when used of God as when it is used of man, yet it is sufficiently explained by that common use, to allow of its being intelligibly applied to the Divine Nature. The other words, which occur in the above account of the doctrine,—Three, One, He, God, Father, Son, Spirit,—are none of them words peculiar to theology, have all a popular meaning, and are used according to that obvious and popular meaning, when introduced into the Catholic dogma. No human words indeed are worthy of the Supreme Being, none are adequate; but we have no other words to use but human, and those in question are among the simplest and most intelligible that are to be found in language.
There are then no terms in the foregoing exposition which do not admit of a plain sense, and they are there used in that sense; and, moreover, that sense is what I have called real, for the words in their ordinary use stand for things. The words, Father, Son, Spirit, He, One, and the rest, are not abstract terms, but concrete, and adapted to excite images. And these words thus simple and clear, are embodied in simple, clear, brief, categorical propositions. There is nothing abstruse either in the terms themselves, or in their setting. It is otherwise of course with formal theological treatises on the subject of the dogma. There we find such words as substance, essence, existence, form, subsistence, notion, circumincession; and, though these are far easier to understand than might at first sight be thought, still they are doubtless addressed to the intellect, and can only command a notional assent.
It will be observed also that not even the words "mysteriousness" and "mystery" occur in the exposition which I have above given of the doctrine; I omitted them, because they are not parts of the Divine Verity as such, but in relation to creatures and to the human intellect; and because they are of a notional character. It is plain of course even at first sight that the doctrine is an inscrutable mystery, or has an inscrutable mysteriousness; few minds indeed but have theology enough to see this; and if an educated man, to whom it is presented, does not perceive that mysteriousness at once, that is a sure token that he does not rightly apprehend the propositions which contain the doctrine. Hence it follows that the thesis "the doctrine of the Holy Trinity in Unity is mysterious" is indirectly an article of faith. But such an article, being a reflection made upon a revealed truth in an inference, expresses a notion, not a thing. It does not relate to the direct apprehension of the object, but to a judgment of our reason upon the object. Accordingly the mysteriousness of the doctrine is not, strictly speaking, intrinsical to it, as it is proposed to the religious apprehension, though in matter of fact a devotional mind, on perceiving that mysteriousness, will lovingly appropriate it, as involved in the divine revelation; and, as such a mind turns all thoughts which come before it to a sacred use, so will it dwell upon the Mystery of the Trinity with awe and veneration, as a truth befitting, so to say, the Immensity and Incomprehensibility of the Supreme Being.
However, I do not put forward the mystery as the direct object of real or religious apprehension; nor again, the complex doctrine (when it is viewed, per modum unius, as one whole), in which the mystery lies. Let it be observed, it is possible for the mind to hold a number of propositions either in their combination as one whole, or one by one; one by one, with an intelligent perception indeed of all, and of the general direction of each towards the rest, yet of each separately from the rest, for its own sake only, and not in connexion and one with the rest. Thus I may know London quite well, and find my way from street to street in any part of it without difficulty, yet be quite unable to draw a map of it. Comparison, calculation, cataloguing, arranging, classifying, are intellectual acts subsequent upon, and not necessary for, a real apprehension of the things on which they are exercised. Strictly speaking then, the dogma of the Holy Trinity, as a complex whole, or as a mystery, is not the formal object of religious apprehension and assent; but as it is a number of propositions, taken one by one. That complex whole also is the object of assent, but it is the notional object; and when presented to religious minds, it is received by them notionally; and again implicitly, viz. in the real assent which they give to the word of God as conveyed to them through the instrumentality of His Church. On these points it may be right to enlarge.
Of course, as I have been saying, a man of ordinary intelligence will be at once struck with the apparent contrariety between the propositions one with another which constitute the Heavenly Dogma, and, by reason of his spontaneous activity of mind and by an habitual association, he will be compelled to view the Dogma in the light of that contrariety,—so much so, that to hold one and all of these separate propositions will be to such a man all one with holding the mystery, as a mystery; and in consequence he will so hold it;—but still, I say, so far he will hold it only with a notional apprehension. He will accurately take in the meaning of each of the dogmatic propositions in its relation to the rest of them, combining them into one whole and embracing what he cannot realize, with an assent, notional indeed, but as genuine and thorough as any real assent can be. But the question is whether a real assent to the mystery, as such, is possible; and I say it is not possible, because, though we can image the separate propositions, we cannot image them altogether. We cannot, because the mystery transcends all our experience; we have no experiences in our memory which we can put together, compare, contrast, unite, and thereby transmute into an image of the Ineffable Verity;—certainly; but what is in some degree a matter of experience, what is presented for the imagination, the affections, the devotion, the spiritual life of the Christian to repose upon with a real assent, what stands for things, not for notions only, is each of those propositions taken one by one, and that, not in the case of intellectual and thoughtful minds only, but of all religious minds whatever, in the case of a child or a peasant, as well as of a philosopher.
This is only one instance of a general principle which holds good in all such real apprehension as is possible to us, of God and His Attributes. Not only do we see Him at best only in shadows, but we cannot bring even those shadows together, for they flit to and fro, and are never present to us at once. We can indeed combine the various matters which we know of Him by an act of the intellect, and treat them theologically, but such theological combinations are no objects for the imagination to gaze upon. Our image of Him never is one, but broken into numberless partial aspects, independent each of each. As we cannot see the whole starry firmament at once, but have to turn ourselves from east to west, and then round to east again, sighting first one constellation and then another, and losing these in order to gain those, so it is, and much more, with such real apprehensions as we can secure of the Divine Nature. We know one truth about Him and another truth,—but we cannot image both of them together; we cannot bring them before us by one act of the mind; we drop the one while we turn to take up the other. None of them are fully dwelt on and enjoyed, when they are viewed in combination. Moreover, our devotion is tried and confused by the long list of propositions which theology is obliged to draw up, by the limitations, explanations, definitions, adjustments, balancings, cautions, arbitrary prohibitions, which are imperatively required by the weakness of human thought and the imperfections of human languages. Such exercises of reasoning indeed do but increase and harmonize our notional apprehension of the dogma, but they add little to the luminousness and vital force with which its separate propositions come home to our imagination, and if they are necessary, as they certainly are, they are necessary not so much for faith, as against unbelief.
Source: Grammar of Assent (Newman Reader)