Moreover, such knowledge of persons is as solid as it is important. That two plus two make four cannot be gainsaid, and doubtless no other kinds of information can be quite so absolute as mathematical theorems. But when one thinks of a comrade, long loved and trusted until he is known through and through, for practical purposes one can think of nothing more stable than his knowledge of his friend. The plain fact is that we do know people, know them well, and that this knowledge never has been or can be a matter of logical demonstration. By taking Arthur Hallam to pieces and analyzing him, the inductive mind might work out all the laws that are involved in Arthur Hallam's constitution; but that mind with all its knowledge would not know Arthur Hallam. Tennyson's "In Memoriam," however, makes clear that knowledge of a friend is not interdicted because scientific demonstration cannot supply it. Tennyson knew Hallam well, and this knowledge, far more solid and significant than most other information he possessed, was not achieved by grinding laws out of facts; it came, as all such knowledge comes, by faith.
As one considers what this understanding of the personal world, seen with the open eyes of trust and loyalty, means to us, how assured it is, how it enriches and deepens life, he perceives that here at least faith is something far more than a stop-gap for ignorance, a dream, a fantasy. It is positively a pathway to truth.
There is another realm where faith is our only way of dealing with reality; by it alone can we know the possibilities of individuals and of society. We are well assured now in the United States that the nation can be economically prosperous without slavery. But sixty years ago plenty of people were assured of the contrary, were convinced that if the abolitionists succeeded we could not economically endure. How did we come by this significant knowledge that the immoral system was dispensable? Not by logical demonstration. The economists of most of our universities logically demonstrated that slavery was essential. Faith was the pathway to the truth. Faith that a new order minus slavery was possible gained adherents, grew in certainty with access of new believers, fed its followers on hopes unrealized but passionately believed in, until faith became experiment, and experiment became experience, and experience brought forth knowledge. The nation trusted and tried. This is the only way to truth in the realm of moral possibilities. If the world were finished, its i's all dotted and its t's all crossed, we might exist on that sort of descriptive science that finds the facts and plots their laws. But the world is in the making; what is actual is not quite so important to us as what is possible; we live, as Wordsworth sings, in
"Hope that can never die, Effort and expectation and desire, And something evermore about to be."
To endeavor to satisfy man, therefore, with descriptions of the actual is preposterous. The innermost meaning of personal and social life lies in the contrast between what we are and what we may become. Beyond the achieved present and the demonstrable future, stands the ideal, whose possibility we can never know as a truth without faith enough to try.
When, therefore, one hears disparagement of faith as a poor makeshift for knowledge, he may be pardoned a sharp rejoinder. When has man ever found solid knowledge in this most important realm of human possibilities, without faith as the pioneer? We do not know first and then supply by belief what knowledge lacks. We believe first, as Columbus did, and then find new continents because what faith first suggested a great venture has confirmed. When Stephenson proposed to run a steam car forty miles an hour, a host of wise-acres proved the feat impossible on the ground that no one could move through the air so rapidly and still survive. If now we know that one easily survives a speed of over a hundred miles an hour in an aeroplane, it is because a faith that saw and dared introduced us to the information. We know now that democracy is not a futile dream, nor the conquest of the air by wireless and of the land by electricity a madman's frenzy; we know truths of highest import and certainty from the usefulness of radium to the wisdom of religious liberty, and all this knowledge existed as belief in possibility before it became truth in fact. Faith was "assurance of things hoped for, a conviction of things not seen" (Hebrews 11:1). Faith is no makeshift. Its power is nowhere felt more effectively than in the achievement of knowledge.
IV
So far is faith, then, from being blind credulity, that it alone deserves to be called the Great Discoverer. Everywhere faith goes before as a pioneer and the more prosaic faculties of the mind come after to civilize the newly opened territory. In the evolution of the senses touch developed first. All the knowledge that any creature had, concerned the tangible. But in time other senses came. Dimly and uncertainly creatures discerned by hearing and seeing the existence of distant objects. They became aware of presences which as yet they could not touch; they were furnished with clues, in following which they found as real what at first had been intangible. Such a relation faith bears to knowledge. Faith, said Clement of Alexandria, is the "ear of the soul." Said Ruskin, faith is "veracity of insight." By it we hear what as yet we cannot touch and see what the arms of our logic are not long enough to reach.
All the elemental, primary facts of life are faith's discoveries; we have no other means of finding them. By faith we discover our selves. We do not hold back from living until we can prove that we exist. We never can strictly prove that we exist. The very self that we are trying to demonstrate would have to be used in the demonstration. We have no other way of getting at ourselves except to take ourselves for granted—accepting
"This main miracle that you are you, With power on your own act and on the world."
As Mr. Chesterton remarked, "You cannot call up any wilder vision than a city in which men ask themselves if they have any selves." By faith all men go out to live as though their selves were real.
By faith we accept the existence of the outer world. We do not restrain ourselves from acting as though the physical world were really there, until we can prove it. We never can strictly prove it; perhaps it is not there at all. When through a microscope an Indian was shown germs in the Ganges' water, to convince him of the peril of its use, he broke the instrument with his cane, as though when the microscope was gone, the facts had vanished too. In his philosophy all that we see is illusion. Perhaps this is true—the world a phantasm and our minds fooling us. But none of us believes it. And we do not believe it because we live by faith—the elemental faith on which all common sense and science rest and without which man's thought and work would halt—that our senses and our minds tell us the truth. "It is idle to talk always of the alternative of reason and faith. Reason itself is a matter of faith. It is an act of faith to assert that one's thoughts have any relation to reality at all."
By faith we even discover the universe. We cannot think of the world as a multiverse; we always think of it as having unity, and we do so whether as scientists we talk about the uniformity of nature, or as Christians we speak of one Creator. Not only, however, can no one demonstrate that this is a universe; it positively does not look as though it were. Opposing powers snarl at each other and clash in a disorder that gives to the casual observer not the slightest intimation that any unity is there. Thunder storms and little babies, volcanoes and Easter lilies, immeasurable nebulæ in the heavens and people getting married on the earth—what indescribable contrasts and confusions! Still we insist on thinking unity into this seeming anomaly, and out of it we wrest scientific doctrines about the uniformity of law. As Professor James, of Harvard, put it, "The principle of uniformity in nature has to be