If then it be our prerogative, as rational beings, and our duty as Christians, to think, as well as to act, rationally—to see that our convictions of truth rest on the grounds of right reason; and if it be one of the clearest dictates of reason, that we should endeavour to shun, and on discovery should reject, whatever is contradictory to the universal laws of thought, or to doctrines already established, I know not by what means we are to avoid the application of philosophy, at least to some extent, in the study of theology. For to determine what are the grounds of right reason, what are those ultimate truths, and those universal laws of thought, which we cannot rationally contradict, and by reflection to compare with these whatever is proposed for our belief, is in fact to philosophize; and whoever does this to a greater or less extent, is so far a philosopher in the best and highest sense of the word. To this extent we are bound to philosophize in theology, as well as in every other science. For what is not rational in theology, is, of course, irrational, and cannot be of the household of faith; and to determine whether it be rational in the sense already explained or not, is the province of philosophy. It is in this sense that the Work before us is to be considered a philosophical work, namely, that it proves the doctrines of the Christian Faith to be rational, and exhibits philosophical grounds for the possibility of a truly spiritual religion. The reality of those experiences, or states of being, which constitute experimental or spiritual religion, rests on other grounds. It is incumbent on the philosopher to free them from the contradictions of reason, and nothing more; and who will deny, that to do this is a purpose worthy of the ablest philosopher and the most devoted Christian? Is it not desirable to convince all men that the doctrines, which we affirm to be revealed in the Gospel, are not contradictory to the requirements of reason and conscience? Is it not, on the other hand, vastly important to the cause of religious truth, and even to the practical influence of religion on our own minds, and the minds of the community at large, that we should attain and exhibit views of philosophy and doctrines in metaphysics, which are at least compatible with, if they do not specially favour, those views of religion, which, on other grounds, we find it our duty to believe and maintain? For, I beg it may be observed, as a point of great moment, that it is not the method of the genuine philosopher to separate his philosophy and religion, and adopting his principles independently in each, to leave them to be reconciled or not, as the case may be. He has, and can have, rationally but one system, in which his philosophy becomes religious, and his religion philosophical. Nor am I disposed in compliance with public opinion to limit the application of this remark, as is usually done, to the mere external evidences of revelation. The philosophy which we adopt will and must influence not only our decision of the question, whether a book be of divine authority, but our views also of its meaning.
But this is a subject, on which, if possible, I would avoid being misunderstood, and must, therefore, exhibit it more fully, even at the risk of repeating what was said before, or is elsewhere found in the Work. It has been already, I believe, distinctly enough stated, that reason and philosophy ought to prevent our reception of doctrines claiming the authority of revelation only so far as the very necessities of our rational being require. However mysterious the thing affirmed may be, though it passeth all understanding, if it cannot be shown to contradict the unchangeable principles of right reason, its being incomprehensible to our understandings is not an obstacle to our faith. If it contradict reason, we cannot believe it, but must conclude, either that the writing is not of divine authority, or that the language has been misinterpreted. So far it seems to me, that our philosophy ought to modify our views of theological doctrines, and our mode of interpreting the language of an inspired writer. But then we must be cautious, that we philosophize rightly, and "do not call that reason which is not so." Otherwise we may be led by the supposed requirements of reason to interpret metaphorically, what ought to be received literally, and evacuate the Scriptures of their most important doctrines. But what I mean to say here is, that we cannot avoid the application of our philosophy in the interpretation of the language of Scripture, and in the explanation of the doctrines of religion generally. We cannot avoid incurring the danger just alluded to of philosophizing erroneously, even to the extent of rejecting as irrational that which tends to the perfection of reason itself. And hence I maintain, that instead of pretending to exclude philosophy from our religious inquiries, it is very important that we philosophize in earnest—that we should endeavour by profound reflection to learn the real requirements of reason, and attain a true knowledge of ourselves.
If any dispute the necessity of thus combining the study of philosophy with that of religion, I would beg them to point out the age since that of the Apostles, in which the prevailing metaphysical opinions have not distinctly manifested themselves in the prevailing views of religion; and if, as I fully believe will be the case, they fail to discover a single system of theology, a single volume on the subject of the Christian religion, in which the author's views are not modified by the metaphysical opinions of the age or of the individual, it would be desirable to ascertain, whether this influence be accidental or necessary. The metaphysician analyzes the faculties and operations of the human mind, and teaches us to arrange, to classify, and to name them, according to his views of their various distinctions. The language of the Scriptures, at least to a great extent, speaks of subjects that can be understood only by a reference to those same powers and processes of thought and feeling, which we have learned to think of, and to name, according to our particular system of metaphysics. How is it possible then to avoid interpreting the one by the other? Let us suppose, for example, that a man has studied and adopted the philosophy of Brown, is it possible for him to interpret the 8th chapter of Romans, without having his views of its meaning influenced by his philosophy? Would he not unavoidably interpret the language and explain the doctrines, which it contains, differently from one, who should have adopted such views of the human mind as are taught in this Work? I know it is customary to disclaim the influence of philosophy in the business of interpretation, and every writer now-a-days on such subjects will assure us, that he has nothing to do with metaphysics, but is guided only by common sense and the laws of interpretation. But I should like to know how a man comes by any common sense in relation to the movements and laws of his intellectual and moral being without metaphysics. What is the common sense of a Hottentot on subjects of this sort? I have no hesitation in saying, that from the very nature of the case, it is nearly, if not quite, impossible for any man entirely to separate his philosophical views of the human mind from his reflections on religious subjects. Probably no man has endeavoured more faithfully to do this, perhaps no one has succeeded better in giving the truth of Scripture free from the glosses of metaphysics, than Professor Stuart. Yet, I should risk little in saying that a reader deeply versed in the language of metaphysics, extensively acquainted with the philosophy of different ages, and the peculiar phraseology of different schools, might ascertain his metaphysical system from many a passage of his Commentary on the Epistle to the Hebrews. What then, let me ask, is the possible use to the cause of truth and of religion, from thus perpetually decrying philosophy in theological inquiries, when we cannot avoid it if we would? Every man, who has reflected at all, has his metaphysics; and if he reads on religious subjects, he interprets and understands the language which he employs, by the help of his metaphysics. He cannot do otherwise.—And the proper inquiry is, not whether we admit our philosophy into our theological and religious investigations, but whether our philosophy be right and true. For myself, I am fully convinced that we can have no right views of theology, till we have right views of the human mind; and that these are to be acquired only by laborious and persevering reflection. My belief is, that the distinctions unfolded in this Work will place us in the way to truth, and relieve us from numerous perplexities, in which we are involved by the philosophy which we have so long taken for our guide. For we are greatly deceived, if we suppose for a moment that the systems of theology which have been received among us, or even the theoretical views which are now most popular, are free from the entanglements of worldly wisdom. The readers of this Work will be able to see, I think, more clearly the import of this remark, and the true