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                This essay was originally published in Thovght, and then 
                edited and reprinted in Anthony O. Simon (ed.), Philosopher 
                at Work. We thank both Anthony Simon and the editors of 
                Thovght for granting us permission to republish it in our 
                Thomas International website. 
                
                
                  
                  
                
                
                The intelligence of faith is the 
                rational science of the secrets of God, and it will live eternally when faith itself shall have come to an end. 
                
                
                  
                
                
                  
                
                
                THE RATIONALITY OF THE CHRISTIAN FAITH
                
                 
                
                
                                               
                
                
                  
                
                
                CHRISTIAN FAITH HOLDS that the destiny of man is not altogether 
                natural. It highly values moral virtues and all the perfections 
                that human nature strives to achieve, such as true knowledge, 
                mastery over the physical world, the perception and creation of 
                beauty, peace of soul and cooperation among persons. But in the 
                Christian vision of destiny greater goods, which lie beyond the 
                range of man's natural possibilities, are actually accessible to 
                him. Between human nature and these supernatural perfections the 
                relation is such that the ultimate meaning of the goods of 
                nature, the most decisive reason of their desirability, the 
                principle which ultimately determines in what amount they should 
                be desired and under what conditions they should be given up, 
                their ultimate vindication and their supreme rule, are not found 
                in nature but beyond it. 
                
                
                The supernatural character of human destiny marks, in all its 
                phases, the mysterious history of mankind in its relation to 
                God. Man was created in a state which involved, besides perfect 
                integrity of nature, supernatural and preternatural privileges. 
                His reason was steadily obedient to divine command and his 
                appetite to reason; moreover, he was spared the hardships 
                inherent in his natural condition: the 
                irksomeness of labor, the pains of childbirth, exposure to 
                disease and, above all, the inevitability of death. Yet, he was 
                not confirmed in sanctity. The possibility of sin was not 
                altogether excluded. In spite of perfect awareness, man chose to 
                sin and lost the privileges of his original innocence. These 
                privileges were deeply grafted in his nature and could not be 
                torn off, by sin, without nature itself undergoing damage. The 
                fallen man is wounded. Over and above the contingencies to which 
                his nature is subject, he suffers from disturbances which render 
                exceedingly precarious the maintenance of a rational order in 
                the operations of his excellent faculties. If denied any 
                supernatural assistance, a rational animal imperfect health 
                would still be a rather poor thing: his would be a law of slow 
                progress through trials and errors, with a high ratio of 
                failure. The wounds left by the sin make everything worse. Man 
                has come to depend on supernatural help even within the realm of 
                his natural accomplishment. 
                
                
                But the fall was followed by a promise of recovery. The Second 
                Person of the Divine Trinity became man, and through suffering 
                and death redeemed the human race. The Holy Spirit was sent to 
                the Church founded by Christ. The Word of truth remained among 
                us. The flow of grace would never cease. The wounds of the 
                original sin can be healed, not by any natural process but by 
                supernatural participation in divine life. In a world of 
                frailty, of universal suffering and of sin, eternal life has 
                begun. No matter how painful to nature, death is defeated, for 
                it can neither terminate nor interrupt the life of supernatural 
                union with God. 
                
                
                How are all these truths known to us? Not by demonstration, but 
                by revelation. Christian faith is primarily concerned with the 
                secrets of God. The word "mystery," in the context of faith, 
                assumes a meaning with no precedent in the rational 
                sciences‑‑although these often deal with questions that can be 
                termed mysteries with propriety. A mystery of faith is a truth 
                naturally accessible to the divine intellect and to no other 
                intellect. For creatures, the only possible access to such 
                truths is revelation, i.e., disclosure by God himself."... And 
                no one knows the Son except the Father, nor does anyone know the 
                Father except the Son, and him to whom the Son chooses to reveal 
                him" (Matt. 11:27). Indeed, faith covers many truths which, 
                considered in themselves, have no character of secrecy (e.g., 
                "Isaac was the son of Abraham"). But it is by reason of their 
                connection with mysteries that all such truths belong to faith. 
                Moreover, there is an order among mysterious truths: the mystery 
                of the Divine Trinity comes first. And from all this it can be 
                gathered that the most direct way to a central insight on 
                whatever may be termed the rationality of the Christian Faith is 
                an inquiry into the part played by the reason in our approach to 
                the divine Trinity. 
                
                
                The ambitions of Christian philosophers have sometimes seemed to 
                try to force into the domain of metaphysics some parts or 
                aspects of the revealed mysteries. There have been, in 
                particular, attempts at demonstrating the distinction of three 
                persons within the unity of the divine essence. To ascertain the 
                meaning of these enterprises, let us consider the principle by 
                which the boundaries of metaphysics are ultimately determined. 
                The most diverse schools of thought, from ardent metaphysicians 
                to agnostics, hold that the field of our demonstrations is 
                measured by the basic proportion of our under‑standing to what 
                it knows primarily. Aquinas and his school, on this issue, are 
                strict followers of Aristotle: the only objects that the human 
                understanding attains directly are the natures of the things 
                present in sense experience. The privilege of these natures does 
                not mean that they alone can be subjects of demonstration; it 
                means that any other things knowable to the human mind are 
                known, if at all, through physical and observable things. A 
                science of metaphysics, i.e., a science of the world above 
                sensible nature, is not excluded thereby, but it cannot extend 
                beyond those aspects of the metaphysical world to which the mind 
                is led by the analysis of nature. So far as the knowledge of God 
                is concerned, this is a very severe restriction. Apart from 
                revelation, God remains thoroughly unknown to us except for the 
                attributes that things observable succeed in manifesting. 
                Inasmuch as we observe, in the physical world, the existence of 
                metaphysical features which, by intelligible necessity, cannot 
                exist without being caused by a Being in which we recognize what 
                the word "God" signifies, we know that God exists. The 
                experience of change leads to God as first mover, that of 
                essential sub‑ordinations in efficient causality to the first 
                efficient cause, that of contingency to the necessary being, 
                that of degrees in absolute perfections to the unparticipated 
                perfection, and the experience of finality to an intellect 
                identical with its action. 
                The demonstration of God's existence is complete when we have 
                understood that in the bearer of these predicates there is 
                identity between essence and existence. 
                
                
                Of the divine nature, what can we know? A first method is 
                unqualifiedly negative. Since no term expressing imperfection in 
                any degree can be predicated of God, we remove from Him, against 
                the suggestions of anthropomorphic imagination, all predicates 
                that involve imperfection. To know that God is not living after 
                the fashion of an organism, that He is not sentient, that He is 
                not a body, that He is not changing, that there is in Him no 
                composition of substance and accident, that there is not in Him 
                any composition what so ever, is to know things of great 
                significance about the divine nature. True, it ought to be said 
                that whatever perfection is contained in biological life, in 
                sensation, in corporeity, in change and in any such ways of 
                being, is most certainly possessed by God, but in another and 
                higher form. And thus we are led to these absolute or unmixed 
                perfections which can be predicated of God with propriety. 
                Although every perfection found in the world of our experience 
                is actually restricted, some observable perfections do not 
                imply, by essence and intelligible necessity, any restriction or 
                imperfection. Being, truth, unity, goodness, intelligence, love, 
                freedom, are examples of absolute perfections. "Good" is 
                properly predicated of a good man and of God. Clearly, the human 
                and the divine ways of being good are not identical. "Good" has 
                different meanings according as it is predicated of God or of 
                man. These meanings are at an infinite distance from each other; 
                yet they are not unrelated. I know that "good" is infinitely 
                more properly predicated of God than of the best of men. In the 
                divine way of being good goodness is infinitely more of a 
                goodness than in the human way of the same perfection. However, 
                the divine way of being good and universally the divine way of 
                absolute perfections remain totally unknown to us. A negation 
                terminates our inquiry into the divine nature. The method of 
                analogy, which makes for positive predications about God, is 
                caught between two negations, the first of which is relative to 
                mixed perfections -e.g., biological life, sensation, etc.‑ and 
                the second to the divine mode of the absolute perfections. 
                All the positive results of the way of analogy would be 
                deceptive if they were not straightened out by final negations. 
                Ultimately, we know what God is not rather than what He is, and 
                the notion of learned ignorance, often used in the description 
                of mystical knowledge, applies also properly to the metaphysics 
                of God.  
                
                
                How are these metaphysical procedures related to the knowledge 
                of the divine mysteries? Indeed, whenever we ask whether certain 
                predicates‑‑say, "one," "good," "loving"‑‑can be asserted of God 
                in a proper sense, the only source of our answer is the causal 
                analysis which constitutes the demonstration of God's existence. 
                Again, this analysis properly leads to the bearer of predicates 
                in correspondence with the metaphysical features of observable 
                reality. If I want to know whether a certain predicate, say, 
                "loving," pertains to God formally, the only method allowed by 
                the basic relation of the intellect to its primary object 
                consists in seeing whether such a predicate as "loving" can be 
                deductively connected with the notion of a subject which is 
                first mover, first efficient cause, necessary being, first being 
                and intellect in ultimate actuality. Where such deductive 
                connection is lacking, no conclusion can be attained. The ways 
                that lead the human mind to a natural and rational knowledge of 
                God are causal inferences. From diverse angles, they all 
                manifest God as first cause of the observable world. Now, this 
                name "first cause" pertains to the unity of the divine essence, 
                not to the trinity of the divine persons. Indeed the principle 
                of proportion which imposes such restrictions upon the 
                metaphysical abilities of the human mind imposes basically 
                similar restrictions upon the metaphysical abilities of any 
                created or creatable intellect. A created intellect cannot be 
                naturally related to God by direct proportion. The divine being 
                is not the direct and primary object of any intellect, save the 
                intellect of God Himself. No matter how high in the hierarchy of 
                spiritual creatures, a created intellect has for its primary 
                object a created being, and the only way for it to know God is 
                to reach Him as term of a causal inference grounded in the 
                metaphysical characteristics of creatures. Then God is attained 
                in essential, not in personal predicates. The trinity of the 
                divine persons remains unknown. 
                
                
                Granted that it is impossible to demonstrate the reality of a 
                mystery, is it possible, at least, to establish its possibility? 
                Granted that the fact of the Trinity is knowable only by 
                revelation, is it possible to show that the revealed dogma 
                involves no contradiction? In God, there is no discrepancy 
                between noncontradiction and unqualified possibility, neither is 
                there in Him any discrepancy between possibility and actuality. 
                God is actually all that He is possibly: such is the meaning of 
                divine necessity. If the possibility of the fact were 
                demonstrated, its actuality would be made obviously the same 
                demonstration. The essential obstacles by reason of which it is 
                impossible to demonstrate that there are three persons in God 
                also make it impossible to demonstrate that there can be a 
                trinity of divine persons. No metaphysical genius will ever 
                positively show that there is nothing contradictory about the 
                proposition that there are three persons in God. No 
                demonstration will ever positively show that this proposition is 
                not absurd. Such things cannot be demonstrated. Like the divine 
                modalities of the divine perfections they cannot be disclosed 
                clearly except in a vision. Again, the metaphysician ends his 
                discourse by denying himself all knowledge of things which can 
                be known only from the standpoint of the Deity. All his 
                knowledge of God, no matter how valuable, proceeds from the 
                standpoint of entity; all he knows is being and its causes, 
                secondary and First. The so‑called natural theology is but a 
                chapter of ontology, the chapter conversant with the first cause 
                of being. Supernatural mysteries belong to the universe of the 
                Deity: like the divine mode of the absolute perfections, they 
                are placed beyond the ultimate negations uttered by metaphysics, 
                beyond the last word of its learned ignorance. In faith, with 
                all its obscurity, and its dependence upon authority and free 
                choice, we recognize the essence of transrational knowledge. 
                
                
                There is in the general theory of authority a contrast which 
                throws much light on knowledge by faith. In the world of action, 
                the functions of authority are either essential or 
                substitutional. Authority exercises essential functions when the 
                very nature of social relations is what makes it necessary; but 
                when it is made necessary by a mere decency, its function is 
                substitutional. In matters of knowledge the function of 
                authority is always substitutional, never essential. 
                Just as the judgment and will of the father substitute for the 
                immature powers of the child in the pursuit of the child's own 
                happiness, so, in the approach to theoretical truth authority 
                plays by substitution a part which properly belongs to the 
                object. Considered in its essence, the determination of the 
                theoretical assent is neither a matter of authority nor a matter 
                of liberty: it is a matter of  objectivity. This is one of the 
                reasons why the unrenewable facts of  history pertain to 
                theoretical life in a merely oblique and qualified way. Except 
                for the persons who happened to be present when and  where the 
                unrenewable event occurred, the only way to know it is 
                dependence upon the authority of witnesses.  
                
                
                The authority of the mere witness is but veracity made 
                recognizable by signs. Such authority does not imply in any way 
                the power to give orders. There is, however, a particular kind 
                of witness in whom authority in the sense of recognizable 
                veracity is associated with authority in the sense of power to 
                command. The teacher is an ambiguous personage: on the one hand 
                he is a witness whom society holds reliable, on the other hand 
                he is a leader in charge of managing externals in the life of 
                learning. Teachers are commonly treated with suspicion: indeed, 
                by reason of their two‑sided character, they are exposed to 
                particularly vicious temptations. As witness, a teacher has but 
                to say the truth and produce convincing evidences of his 
                veracity. As administrative agent, he has the power of issuing 
                orders and a right to be obeyed. The temptation is great to use 
                this power and this right to strengthen the evidences of his 
                veracity. Correspondingly, the submissive student may like to be 
                told what to think just as he is told what readings he should do 
                and what questions he should answer. The authority of the 
                witness concerns assent to truth and involves no command; the 
                authority of an administrator involves a command but it does not 
                concern assent to truth. Generally speaking, man owes obedience 
                to man with regard to external acts alone, and God alone has a 
                right to his obedience with regard to internal acts. 
                Acknowledging truth is an act characterized by supreme 
                interiority. The only witness whose authority involves a right 
                to be obeyed is the divine witness, the only teacher who speaks 
                with authority (Matt. 7:29), i.e., who causes an obligation to 
                believe his words, is the Word of God. This divine privilege is 
                partaken of by the Church without becoming in any sense a human 
                privilege. For it is by reason of her divine origin and 
                inspiration, not by reason of anything human in her, that the 
                Church obliges minds to believe in a testimony which is one with 
                that of the divine Word.   
                
                
                The unique privilege of the divine teacher does not affect in 
                anyway or degree the substitutional character of authority in 
                matters of theoretical assent. A truth adhered to by reason of 
                divine testimony is possessed of a certainty surpassing that of 
                any natural knowledge: yet the assent to such a truth is not 
                determined by the object alone, and this constitutes, in spite 
                of certainty and sublimity, a radical imperfection. The assent 
                of faith is altogether provisional, and animated by a dynamism 
                relative to another mode of revelation, where assent is 
                determined by the object alone, and where neither authority nor 
                liberty have any part to play. Many difficulties commonly held 
                insuperable would be removed if it were better realized that 
                teaching authority, even in the case of the divine teacher, 
                remains substitutional and provisional. A relation to vision is 
                included in the definition of faith: "Now faith is the substance 
                of things to be hoped for, the evidence of things that are not 
                seen" (Heb. 11-1). 
                
                
                The notion of transrationality, already used in the description 
                of the mysteries, now assumes a new meaning and a new 
                significance. Faith tends, by its innermost dynamism, toward the 
                clarity of a knowledge which is transrational not only inasmuch 
                as it transcends the powers of reason, but also inasmuch as it 
                surpasses, by an infinite qualitative distance, the clarity that 
                reasoning is able to procure. The intuitive apprehension of 
                divine truth may be described as the term of a progress whose 
                initial phase is rational knowledge. When a proposition which 
                for some time has been held true on account of observable 
                regularities alone comes to be rationally understood, the 
                difference is that the necessity of its truth has become an 
                object of understanding. A middle term makes it clear that the 
                subject considered would both be and not be what it is if it did 
                not possess the property predicated of it in the demonstrated 
                conclusion. All the greatness of the rational process consists 
                in its ability to show that the law of identity is at work in a 
                case devoid of immediate obviousness. The discursiveness of the 
                rational process, inasmuch as it excludes the perfection of 
                immediacy, is a limitation on what constitutes the worth of 
                rationality. This can be summed up by saying that there is in 
                rationality a value which tends toward freedom from all the 
                restrictions proper to the discursive methods of reason. The 
                promised vision, to which faith is relative, is a revelation by 
                way of intuition; there does not remain in it any element of 
                discourse; neither does it use any sign or created idea. The 
                features which distinguish rational knowledge have disappeared, 
                but the perfection clumsily procured by the procedures of our 
                reason ultimately triumphs in a divine state of things. For the 
                beatific vision consists in seeing God as He is. 
                
                
                After having described the transrational clarity to which faith 
                aspires, let us now consider the operations which precede and 
                prepare the act of faith. To the question whether faith can be 
                rationally established, let it be answered that truth is one 
                thing and credibility an entirely different thing. The truth of 
                faith is known transrationally in the beatific vision, but so 
                long as there is no vision, it is held in darkness, on authority 
                and by a choice which is free without being in any sense 
                arbitrary. There is no such thing as a rational establishment of 
                the truth of faith. What can be established rationally is the 
                credibility of faith propositions. Reason can show that 
                believing is a sound, honest, virtuous action, that it is, for 
                sure, the action expected of a man determined to seek the right 
                and to avoid the wrong. But between showing that a proposition 
                is believable and ought to be believed and showing that it is 
                true, there is a world of difference. Inasmuch as rational work 
                shows that faith propositions are believable, we may speak of 
                the rationality of faith: but this expression, in such a 
                context, designates merely the reasonableness of supernatural 
                belief.   
                
                
                The dynamism of faith comprises two tendencies toward clarity. 
                The first is an eagerness to attain, beyond the natural horror 
                of death, the state of vision. The other is an endeavor to 
                obtain, within the necessary obscurity of faith, all possible 
                intelligence of revelation. In definite conditions of 
                orderliness, the second tendency gives birth to theology. 
                
                
                Against the widespread theory which confusedly describes 
                theology as an application of philosophic forms to revealed 
                data, let it be recalled that faith is the principal cause of 
                theological knowledge. According to the words of Aquinas, 
                theology is a discipline where the role of first principles is 
                played by propositions of faith. In rational science the 
                principles anterior to demonstration, the axioms from which 
                demonstration flows, are propositions possessed of immediate 
                evidence. But the axioms of theology are known by faith. Faith 
                is to theology what natural understanding is to rational 
                science. All that is genuine in theology draws its life from 
                faith, and if a theologian falls into infidelity, what is left 
                in his mind is but corpse. The role of philosophic and other 
                rational disciplines in theology is instrumental, which does not 
                mean that it is unimportant. Such expressions as light, clarity, 
                clarification, explanation, demonstration, understanding, 
                manifestation, intelligence, penetration and rationalization are 
                commonly used in the description of the theological work: all 
                are legitimate provided it is well understood that the states, 
                qualities and achievements which they designate take place 
                within faith and its obscurity, but all would be misleading if 
                they suggested that, as a result of ingenuity in the handling of 
                his rational instruments, the theologian succeeds in 
                emancipating his science from the obscurity of faith. No 
                instrument can procure a perfection -e.g., freedom from 
                obscurity -excluded by the very nature of the principal cause. 
                
                
                 Let us now consider the various procedures used by theology in 
                its endeavor to bring about the understanding of faith. 
                (1) First comes the orderly collecting of revealed truths, 
                through the study of Holy Scripture and Tradition. This 
                "positive" or "historical" function of theology uses all 
                resources made available by history, yet is not reducible to a 
                piece of historical research; inasmuch as it is exercised under 
                the teaching authority of the Church it is, as certainly as any 
                other theological function, a work of faith carried out through 
                natural instruments. 
                
                
                (2) Then theology effects the conceptual analysis of revealed 
                truth. Prior to theological work, revealed truths are expressed 
                in the confused concepts of common sense and of Christian sense; 
                it is up to theology to express the same truths with a greater 
                degree of appropriateness and precision. The transition from the 
                more confused to the more distinct, independently of any fresh 
                discovery of truth, is a progress in quality and intensity; it 
                is, in the most proper sense, a progress in intelligence. 
                As examples of concepts elaborated on by theology let us 
                mention: created being and uncreated being; divine wisdom, 
                uncreated love, providence, predestination; nature, person and 
                relation; grace, free choice, merit, sin; infused virtue, faith, 
                hope, charity; sacrament; transubstantiation; beatitude and 
                pain. 
                
                
                (3) Another function of theology is to defend revealed truths 
                against objections. Sometimes the problem is to make it clear 
                that the truth under attack is actually contained in the 
                treasury of revelation. In other cases the objection pretends to 
                find contradiction in a matter of faith; then the theologian 
                endeavors to show that the argument designed to evidence 
                contradiction is devoid of necessitating power, even though it 
                may well enjoy some verisimilitude. As recalled in the 
                foregoing, it is altogether impossible to demonstrate that a 
                mysterious proposition -e.g., "there are three persons in the 
                unity of the divine essence" ‑is noncontradictory. What is it, 
                then, that the theologian does when he argues against those who 
                argue that such a proposition is absurd? He does not positively 
                establish its freedom from contradiction. He just shows that the 
                alleged contradiction is not demonstratively established. By 
                demonstrating that no one has succeeded in demonstrating that a 
                certain proposition of faith is contradictory, the theologian 
                attains new degrees of profundity and precision in the 
                intelligence of this proposition. 
                
                
                (4) In theology as well as in any other domain of thought, it is 
                good to achieve the imperfect condition of probable knowledge 
                when demonstrative certainty is out of the question. Theologians 
                call "arguments of convenience" the nondemonstrative proofs 
                which manifest an agreement between a mystery and a rational 
                truth. Let, for instance, the mystery of the generation of the 
                Word be considered in relation to the diffusiveness of itself 
                which is the metaphysical law of the good. This law expresses a 
                tendency, the tendency of the good to communicate itself. When a 
                statement is considered in relation to a tendency, it may either 
                agree with it, or prove indifferent to it, or contrast with it. 
                Faith propositions concerning the generation of the Word 
                certainly do not contrast with the metaphysical law of the good; 
                neither are they indifferent to it; they definitely agree with 
                the tendency of the good to communicate itself and to achieve 
                greater abundance and intimacy in communication on the loftier 
                levels of existence. To remark that a mysterious proposition 
                places itself along the line of a rational law is to throw 
                rational light upon a mystery; the familiarity of the intellect 
                with the mysterious truth is thereby increased. But the laws of 
                the good, such as they are knowable to us, do not demand, by 
                intelligible necessity, that there be generation of a divine 
                person by another. The argument of convenience falls short of 
                certainty by an infinite distance. 
                
                
                (5) Theology uses discourse, in merely explicative fashion, to 
                manifest the implications of revealed truth. The proposition of 
                St. John "and the Word was made flesh" and the proposition "the 
                Word, consubstantial to the Father, was made man" express the 
                same truth; but as a result of the unfolding effected by 
                theology, this truth is expressed more explicitly and more 
                intelligibly in the latter proposition than in the former. 
                
                
                (6) Theology uses discourse properly so called, i.e., 
                inferential discourse, to deduce, from two revealed truths, a 
                third truth which is itself revealed. Thus, from the 
                propositions "Jesus is truly God" and "Jesus is truly man" it is 
                possible to infer that there are in Jesus two free wills: but 
                this truth is also revealed in Jesus' own words "Yet not as I 
                will, but as thou wiliest" (Matt. 26:39). Prior to the work of 
                theology, this truth is known only by faith; as a result of 
                theological reasoning it is also known in and through its cause, 
                i.e., rationally, though within faith. 
                
                
                (7) Theology uses inferential discourse to deduce, from two 
                revealed truths, a third truth not revealed in itself, but only 
                in the other two. Inasmuch as its premises are revealed, this 
                truth is more than a theological conclusion: it admits of being 
                defined as a dogma. 
                
                
                (8) Finally, theology uses inferential discourse to deduce, from 
                one revealed and one rational premise, a third proposition which 
                properly deserves the name of theological conclusion. The truth 
                expressed by such a conclusion, no matter how certain, is not 
                revealed in an unqualified sense; it does not pertain to faith, 
                but only to theology.  
                
                
                There is a sharp division between the first seven functions of 
                theology and the last. In its eighth function theology reaches 
                propositions that are its own, theological conclusions; 
                elsewhere its work is entirely dedicated to propositions which, 
                on a variety of grounds, belong to revelation. It is relevant to 
                ask whether the main duty of theology is to deduce propositions 
                that belong to it properly, or to manifest the meaning of 
                propositions more sublime than its own. The answer is not 
                dubious. Theology being the intelligence of faith, what pertains 
                more directly to faith is of greater concern to theology that 
                what pertains more properly to theology itself. 
                
                
                If the relation of theology to faith is what we said, is it 
                still possible to consider theology as a science? In every order 
                of research we hold that a proposition which does not admit of 
                analysis into self‑evident principles remains foreign to science 
                properly so called, even though it may belong to a discipline 
                whose core is constituted by propositions in strict connection 
                with immediately evident truth. But all parts of theology, its 
                core of certainty as well as the areas where probability alone 
                can be attained, depend upon and proceed from the inevident 
                propositions of faith. No doubt, the confused notion of theology 
                as an application of philosophic forms to the data of revelation 
                springs from the ambition to achieve, in some way or other, a 
                science of religious subjects. If the rational components of 
                theology are held merely instrumental, if the principles of 
                theology, by reason of their being believed, are purely and 
                simply devoid of obviousness, it seems that theology is not a 
                science. Now, in a treatment of "the rationality of the 
                Christian faith," the scientific nature of theology is an issue 
                of crucial significance.  
                
                
                The answer lies in the consideration that faith is a provisional 
                substitute for vision. The obscurity inherent in any belief 
                would deprive theology of all scientific character if the divine 
                mysteries were to remain everlastingly unseen; but the Teacher 
                on whose authority faith propositions are believed promised His 
                disciples the vision of these mysteries. We find ourselves in a 
                position similar to that of students who cannot yet understand 
                some difficult principles. Assuming that their teacher is 
                dependable, the wise thing to do is to take his word, to accept 
                the principles on belief and to go ahead: understanding will 
                come later. What is the nature of the rational work done by 
                science students on the basis of principles that they 
                provisionally believe? Is this work scientific or not? To answer 
                this question, it suffices to compare the case of science 
                students with that of students in a nonscientific field, say, 
                history. Young historians have to trust their teachers; but they 
                know very well that when they no longer need teachers they will 
                have to trust someone else: except for the small ratio of facts 
                which can be established by physical evidence, history is a 
                matter of belief. Young scientists, on the contrary, during the 
                phase of dependence upon a teacher, are eagerly awaiting the 
                time when they will be able to master the principles and do 
                without witnesses; their work is scientific in substance and 
                tends toward the state of science. Such is the condition of 
                theology in the present life: its substance and its essential 
                inclination are scientific. Yet theology falls short of the 
                scientific state until its principles are apprehended clearly, 
                in other words, until revelation by way of vision replaces 
                revelation by way of faith. "The theology acquired in this life 
                endures in Heaven and is rendered evident there. By intrinsic 
                inclination, theology is radically striving toward evidence and 
                continuity with ... the blessed science. It is by accident that 
                in this life theology uses faith as supplying and supposing 
                principles known with evidence in a higher science" (John of St. 
                Thomas).
                 
                
                
                The dynamism of faith is relative to perfections which cannot be 
                fully achieved so long as the infirmities essential to faith 
                continue to prevail. One of these perfections is clarity; the 
                other is presence. Inasmuch as it is longing for clarity, faith 
                tends to disappear into vision; inasmuch as it is longing for 
                presence, faith tends to disappear into experience, which is 
                knowledge by way of touch. Distance, as well as obscurity, is 
                inseparable from faith, and in a very proper sense faith must 
                die, by the death of man, for its offspring to be born. Yet, in 
                another sense, it is possible to attain, within faith and its 
                eagerness, some sort of clarity and some sort of presence. Here 
                lies the paradox which inevitably occasions puzzlement and 
                confusion regarding the nature of theology and that of mystical 
                experience. Theology is a system of clarity entirely contained 
                in a system marked by obscurity; it is a work of rationality 
                within the power of belief. Mystical experience is a knowledge 
                by way of touch, an undergoing or suffering of things divine 
                within an act of belief which implies infinite distance. Such 
                distance cannot be suppressed un less the being of God assumes 
                the role of idea and effects directly the determination of the 
                human intellect. When the beatific vision sup‑presses all 
                distance, mystical experience does not cease; rather, it is 
                exalted and changed into itself. Likewise, when the principles 
                of theology are apprehended in divine clarity, theology is given 
                its first opportunity to realize the requirements of its 
                essence. Faith has come to an end, but the intelligence of faith 
                lives eternally as rational science of the divine mysteries; 
                this is perhaps the most significant thing that can be said 
                about the rationality of the Christian faith.  
                
                
                  
                  
                
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