A certain broad answer to this inquiry, although it cannot be said to be at all points familiar, is not in reality far to seek. It is an answer which would seem strange indeed to some visitant from a planet peopled wholly by scientific minds. Yet among a race like our own, concerned first and primarily to live and work with thoughts undistracted from immediate needs, the answer is natural enough. For the fact simply is that the intimate importance of this central problem has barred the way to its methodical, its scientific solution.
There are some beliefs for which mankind cannot afford to wait. "What must I do to be saved?" is a question quite otherwise urgent than the cause of the tides or the meaning of the marks on the moon. Men must settle roughly somehow what it is that from the Unseen World they have reason to fear or to hope. Beliefs grow up in direct response to this need of belief; in order to support themselves they claim unique sanction; and thus along with these specific beliefs grows also the general habit of regarding matters that concern that Unseen World as somehow tabooed or segregated from ordinary observation or inquiry.
Let us pass from generalities to the actual history of Western civilisation. In an age when scattered ritual, local faiths—tribal solutions of cosmic problems—were destroying each other by mere contact and fusion, an event occurred which in the brief record of man's still incipient civilisation may be regarded as unique. A life was lived in which the loftiest response which man's need of moral guidance had ever received was corroborated by phenomena which have been widely regarded as convincingly miraculous, and which are said to have culminated in a Resurrection from the dead. To those phenomena or to that Resurrection it would at this point be illegitimate for me to refer in defence of my argument. I have appealed to Science, and to Science I must go;—in the sense that it would be unfair for me to claim support from that which Science in her strictness can set aside as the tradition of a pre-scientific age. Yet this one great tradition, as we know, has, as a fact, won the adhesion and reverence of the great majority of European minds. The complex results which followed from this triumph of Christianity have been discussed by many historians. But one result which here appears to us in a new light was this—that the Christian religion, the Christian Church, became for Europe the accredited representative and guardian of all phenomena bearing upon the World Unseen. So long as Christianity stood dominant, all phenomena which seemed to transcend experience were absorbed in her realm—were accounted as minor indications of the activity of her angels or of her fiends. And when Christianity was seriously attacked, these minor manifestations passed unconsidered. The priests thought it safest to defend their own traditions, their own intuitions, without going afield in search of independent evidence of a spiritual world. Their assailants kept their powder and shot for the orthodox ramparts, ignoring any isolated strongholds which formed no part of the main line of defence.
Meantime, indeed, the laws of Nature held their wonted way. As ever, that which the years had once brought they brought again; and every here and there some marvel, liker to the old stories than any one cared to assert, cropped up between superstition on the one hand and contemptuous indifference on the other. Witchcraft, Swedenborgianism, Mesmerism, Spiritism—these especially, amid many minor phenomena, stood out in turn as precursory of the inevitable wider inquiry. A very few words on each of these four movements may suffice here to show their connection with my present theme.
Witchcraft.—The lesson which witchcraft teaches with regard to the validity of human testimony is the more remarkable because it was so long and so completely misunderstood. The belief in witches long passed—as well it might—as the culminant example of human ignorance and folly; and in so comparatively recent a book as Mr. Lecky's "History of Rationalism," the sudden decline of this popular conviction, without argument or disapproval, is used to illustrate the irresistible melting away of error and falsity in the "intellectual climate" of a wiser age. Since about 1880, however, when French experiments especially had afforded conspicuous examples of what a hysterical woman could come to believe under suggestion from others or from herself, it has begun to be felt that the phenomena of witchcraft were very much what the phenomena of the Salpêtrière would seem to be to the patients themselves, if left alone in the hospital without a medical staff. And in Phantasms of the Living, Edmund Gurney, after subjecting the literature of witchcraft to a more careful analysis than any one till then had thought it worth while to apply, was able to show that practically all recorded first-hand depositions (made apart from torture) in the long story of witchcraft may quite possibly have been true, to the best belief of the deponents; true, that is to say, as representing the conviction of sane (though often hysterical) persons, who merely made the almost inevitable mistake of confusing self-suggested hallucinations with waking fact. Nay, even the insensible spots on the witches were no doubt really anæsthetic—involved a first discovery of a now familiar clinical symptom—the zones analgésiques of the patients of Pitres or Charcot. Witchcraft, in fact, was a gigantic, a cruel psychological and pathological experiment conducted by inquisitors upon hysteria; but it was conducted in the dark, and when the barbarous explanation dropped out of credence much of possible discovery was submerged as well.
Mesmer.—Again, the latent possibilities of "suggestion,"—though not yet under that name, and mingled with who knows what else?—broke forth into a blaze in the movement headed by Mesmer;—at once discoverer and charlatan. Again the age was unripe, and scientific opposition, although not so formidable as the religious opposition which had sent witches to the stake, was yet strong enough to check for the second time the struggling science. Hardly till our own generation—hardly even now—has a third effort found better acceptance, and hypnotism and psycho-therapeutics, in which every well-attested fact of witchcraft or of mesmerism finds, if not its explanation, at least its parallel, are establishing themselves as a recognised and advancing method of relieving human ills.
This brief sketch of the development as it were by successive impulses, under strong disbelief and discouragement, of a group of mental tendencies, faculties, or sensibilities now recognised as truly existing and as often salutary, is closely paralleled by the development, under similar difficulties, of another group of faculties or sensibilities, whose existence is still disputed, but which if firmly established may prove to be of even greater moment for mankind.
At no time known to us, whether before or since the Christian era, has the series of trance-manifestations,—of supposed communications with a supernal world,—entirely ceased. Sometimes, as in the days of St. Theresa, such trance or ecstasy has been, one may say, the central or culminant fact in the Christian world. Of these experiences I must not here treat. The evidence for them is largely of a subjective type, and they may belong more fitly to some future discussion as to the amount of confidence due to the interpretation given by entranced persons to their own phenomena.
But in the midst of this long series, and in full analogy to many minor cases, occurs the exceptional trance-history of Emmanuel Swedenborg. In this case, as is well known, there appears to have been excellent objective evidence both of clairvoyance or telæsthesia[1] and of communication with departed persons;—and we can only regret that the philosopher Kant, who satisfied himself of some part of Swedenborg's supernormal[2] gift, did not press further an inquiry surpassed in importance by none of those upon which his master-mind was engaged. Apart, however, from these objective evidences, the mere subject-matter of Swedenborg's trance-revelations was enough to claim respectful attention. I cannot here discuss the strange mixture which they present of slavish literalism with exalted speculation, of pedantic orthodoxy with physical and moral insight far beyond the level of that age. It is enough to say here that even as Socrates called down philosophy from heaven to earth, so in a somewhat different sense it was Swedenborg who called up philosophy again from earth to heaven;—who originated the notion of science in the spiritual world, as earnestly, though not so persuasively, as Socrates originated the idea of science in this world which we seem to know. It was to Swedenborg first that that unseen world appeared before all things as a realm of law; a region not of mere emotional vagueness or stagnancy of adoration, but of definite progress according to definite relations of cause and effect, resulting from structural laws of spiritual existence and intercourse which we may in time learn partially to apprehend. For my own part I regard Swedenborg,—not, assuredly, as an inspired teacher, nor even as a trustworthy interpreter of his own experiences,—but yet as a true and early precursor of that great inquiry which it is our present object to advance.
The next pioneer—fortunately still amongst us—whom I must mention even in this summary notice, is the celebrated physicist and chemist, Sir W. Crookes. Just as Swedenborg was the first leading man of science who distinctly conceived of the spiritual world as a world of law, so was Sir W. Crookes the first leading man of science who seriously endeavoured to test the alleged mutual influence and interpenetration of the spiritual world and our own by experiments of scientific precision.[3] Beyond the establishment of certain supernormal facts Crookes declined to go. But a large group of persons have founded upon these and similar facts a scheme of belief known as Modern Spiritualism, or Spiritism. Later chapters in this book will show how much I owe to certain observations made by members of this group—how often my own conclusions concur with conclusions at which they have previously arrived. And yet this work of mine is in large measure a critical attack upon the main Spiritist position, as held, say, by Mr. A. R. Wallace, its most eminent living supporter,—the belief, namely, that all or almost all supernormal phenomena are due to the action of spirits of the dead. By far the larger proportion, as I hold, are due to the action of the still embodied spirit of the agent or percipient himself. Apart from speculative differences, moreover, I altogether dissent from the conversion into a sectarian creed of what I hold should be a branch of scientific inquiry, growing naturally out of our existing knowledge. It is, I believe, largely to this temper of uncritical acceptance, degenerating often into blind credulity, that we must refer the lack of progress in Spiritualistic literature, and the encouragement which has often been bestowed upon manifest fraud,—so often, indeed, as to create among scientific men a strong indisposition to the study of phenomena recorded or advocated in a tone so alien from Science.