These examples may suffice to impress at once upon theologians and scientists,—and upon the public mind also,—the obvious, but easily forgotten lesson, that there is need for deliberation before we can clearly decide the exact significance of new scientific discoveries. Neither the spirit of religion, nor the scientific spirit, disposes inquirers to make haste. There is a basis of certainty, sufficiently broad and deep to deliver the mind from concern lest intellectual confusion should arise from continued observation and thought. Enthusiasm, acuteness, patience, and also boldness of speculation, are needed in order to widen the range of our knowledge of the mysteries of existence; but caution is as certainly a necessary feature in the gathering of appliances which must lie at the command of theologians and also of scientific observers. In fact, there is at every fresh advance in science, much thinking to be done, after observation and exposition have accomplished their part, and this thinking can not be quickly done.

Towards a clear marking out of the boundaries of science and religion, it is needful that some definition or description of both be attempted. It is easy to be religious without sharply marking off for one's self the exact boundaries of religion; and equally easy to be scientific, without exactly laying down the limits of science. But any intelligent view of the relations of the two is not to be had without carefully marking off the territory which they respectively occupy. Science at least should seek for itself "a scientific boundary," and though this is not always easily found, it is essential for keeping up friendly relations with neighboring states. In view, therefore, of the requirements of the present subject, something must here be done in the way of definition, or at least, description, delicate and difficult as is the task.

The object of these lectures is, to vindicate the place of the Christian religion within the region of human intelligence, to show its rational harmony with science, and to promote active co-operation between the two. And this is to be done for the Christian religion in view of all the advantages, and of all the alleged disadvantages too, of what has been reproachfully named "a book religion," which assuredly it is, just as all science must become "book science," if it is to become a living and abiding intellectual power among men. For all reliable knowledge must be formulated, must take a definite orderly shape, if it is to find a place and dominion. In the history of intelligent being in this world, religion first of all met this requirement, and subjected itself to this test, adapting itself also to successive ages, and submitting itself to their criticism. Science owns a like intellectual necessity, and has had to write and rewrite, to correct and expand, in order that the book-science might be the true science of the day. Whatever be the nature of the truth received by man, its statement is greatly enhanced in value when it has been reduced to written form, suitable not only for being passed from hand to hand, but for being pondered with all deliberation.

While, however, it is a great advantage to Christianity that it can be described as the religion of the Bible,—and it is to Christianity that reference is directly made here when religion is named,—there is in religion as in science that which comes before the written form. Observation and reflection are natural avenues to religion, as well as to science. The Bible appeals to the intelligence of man for its acceptance, subjecting to rational test not only its evidence but also its teaching. Its uniform demand is that men put its teaching to proof. It thus presupposes a natural religion as the prerequisite for special revelation of the supernatural. The full breadth of the argument in exposition and defence of Christianity is seen only by starting from this position, that all religion, whatever its form, rests on a rational basis. And its correlative is this, irreligion is the irrational. The vindication of the Christian religion thus implies at its basis the defence of religious thought and feeling in whatever associations they may be found. For though it is true that the Christian religion may be said to war against all religions besides, seeking to supplant them, in order to become the universal religion, it does so only on the footing that religious thought and feeling wherever found have a genuine intellectual value, which must work towards deliverance from what is immoral and what is inconsistent in tradition. If it be here remarked that science also tends to the destruction of the traditional beliefs belonging to many of the religions of the world, it may thereby appear that science becomes a fellow-worker with Christianity in a process of demolition required in the interests equally of intelligence, morality, and religion. But whatever may be said of this destructive process as one in which Christianity performs a conspicuous part, the religion of Jesus recognizes a voice in the works of creation speaking to the hearts of men, in all lands, insomuch that "there is no speech nor language where their voice is not heard." Religious belief is thus recognized as a natural possession, and reverence for the Most High as following by rational sequence.

When therefore we offer a defence of the Christian faith and practice, we necessarily undertake some defence of the varied manifestations of natural religion presenting themselves in the world's history. We are not precluded from assigning value to the loftier and purer thought of ancient civilization testifying against "the gods many and lords many" of the popular religion; nor do we refuse to make acknowledgment of those ruder and baser examples of religious observance appearing among tribes of uncivilized men in modern times. In defending religion, we are upholding the lofty conceptions of the Greek philosopher, who said that "God is not the author of evil, but of good only;" who declared that God "is one and the same, immutably fixed in his own proper nature," and that "God and his attributes are absolutely perfect."[B] On the other hand, we can not escape the serious entanglement found among heathen idolatries, for even while such idolatries are utterly condemned, we are ready to maintain that the most irrational idolatries have more of reason in them than the life which has been emptied of religious faith and exercise.

In view of the wide range of natural religion, and the defence of it here implied, we may define religion, as the recognition of a Sovereign Intelligence originating and governing all dependent being, with the homage due from intelligent beings to the Sovereign Intelligence. This is the definition which will include all natural religion, and present the ground of its defence in view of scientific suggestions and perplexities.

But taking the Christian religion as the crown and centre of religious life in the world, we have a more full and commanding testimony as to the glory of the divine nature, and the genuine exercises of a religious life. He is God creating and sustaining all, ruling in righteousness, revealing himself in Jesus Christ, whose glory is "the glory as of the only begotten of the Father full of grace and truth." He is a God seeking the reconciliation of the guilty with himself. He is a God of mercy, calling all intelligent creatures to fellowship with him, and requiring them all to be "holy even as he is holy." Such is a summary of the teaching of Scripture as to the Divine Being, and our relation to him. Thus are we guided in our utterance before him, "O Lord of hosts, God of Israel, that dwellest between the cherubim, thou art the God, even thou alone, of all the kingdoms of the earth: thou hast made heaven and earth" (Isa. xxxvii. 16).

I content myself with a mere summary; for a full knowledge we must take the Bible itself, knowledge of which must be presumed as the condition of criticism, though criticism has been abundant which has borne witness to ignorance of the revelation criticised,—ignorance so marked that had it applied to science it would have been held a proof of incompetence for criticism. We are now to take the Bible representation of God, and of his relation to us; and on the other hand of man's faith in him, and spiritual devotion and service. These are the materials to be harmonized with the teachings of science, by demonstrating that the testimony of science points to a government of the universe harmonizing with the testimony of Scripture. And here it is needful that there be explicitness, that our thesis may be placed beyond doubt. The purpose is not merely to show that science lays no foundation for denial of a Supreme Intelligence, or for an atheistic conception of the universe; nor merely that it affords no place for belief in Deity without knowledge of his nature, for utterance of an empty name, without intelligible content, or an agnosticism, which affects to celebrate the praises of Ignorance, in homage to the name of science; nor merely an immanent or indwelling Deity, who is in all things, and all things in him, so that he is the unifying power, the soul and life of all that is, including those strange contrasts which we call good and evil; but passing all these representations as strange and alien to the Bible, to show that religion and science find their harmony in recognition of a Transcendent Deity, a personal Deity, distinct from the universe,—a personality ruling in righteousness, and delighting to meet the desires of intelligent beings longing after the perfection of holiness.

I can imagine that some devoted students of science are prepared to object to having any share in a discussion which is to include as one of its terms such a purely spiritual conception as this, involving a spiritual relation,—and having as its practical expression a spiritual life.

Not a few scientific men may be prepared to say that all this is quite remote from the region with which they are familiar,—that science can hardly be said to come into contact with such a spiritual region of inquiry. And I grant that there is reason for urging such a consideration. Science can not occupy the place of religion, any more than religion can occupy the place of science. But if there be any on that account feeling themselves precluded from entering on the discussion, they do thereby proclaim themselves disqualified for making any affirmation as to conflict between the two courses of thought and interest. The logical fairness of this argument admits of no challenge. Either scientists must refrain from assertions of conflict,—or they must take the declarations of the Bible, and prove their antagonism to the teachings of science, recognized as belonging to a different sphere of inquiry. As well propose to criticise the conclusions of astronomy in disregard of spectrum analysis, as propose to criticise the intellectual worth of religion in neglect of its spiritual significance.