To what causes are we to attribute the persistence of this belief in the supernatural? It is useless replying that its persistence is evidence of its truth. That clearly begs the whole question at issue. Mere social heredity will doubtless count for much in this direction. Men do not start their thinking afresh with each generation. It is based upon that of preceding generations; it follows set forms, and is generally influenced by that network of ideas and beliefs into which we are born and from which none of us ever completely escapes. Still that is hardly enough in itself to account for the persistence of supernaturalism. Assuming that originally there existed what was accepted as good evidence for the existence of a supernatural, it is hardly credible that every subsequent generation went on accepting it merely because one generation received evidence of its existence. As organs atrophy for want of exercise, so do beliefs die out in time for want of proof. Some kind of evidence must have been continually forthcoming in order to keep the belief alive and active. It is not a question of whether the evidence was good or bad. All evidence, it is important to bear in mind, is good to some one. The "facts" upon which thousands of people were put to death
for witchcraft would not be considered evidence to anyone nowadays, but they were once accepted as good ground for conviction.
What kind of evidence is it, then, that has been accepted as proof of the supernatural? Or, to return to Tylor's definition of religion, seeing that the belief in spiritual beings has persisted in every generation, upon what kind of evidence has this belief been nourished? Various replies might be given to this question, all of which may contain some degree of truth, or an aspect of a general truth. In the present enquiry I am concerned with one line of investigation only, one that has been strangely neglected, but which yet, I am convinced, promises fruitful results. In other directions it has been established that a great aid to an understanding of the human organism in times of health is to study its activities under conditions of disease. Abnormal psychology is now a recognised branch of psychology in general, and a glance through almost any recent text-book will show that the two form parts of a natural whole. The normal and the abnormal are in turn used to throw light on each other. And it appears to the present writer that in the matter of religious beliefs a much clearer understanding of their nature, and also of some of the conditions of their perpetuation, may be gained by a study of what has happened, and is happening, in the light of mental pathology.
To some, of course, the bare idea of there being a pathology of religion will appear an entirely unwarrantable assumption. On the other hand, the scientific study of all phases of religions having made so great headway it is hoped that a larger number will be prepared
for a discussion of the subject from a point of view which, if not quite new, is certainly not common. Of course, such a discussion, even if the author quite succeeds in demonstrating the truth of his thesis, will still leave the origin of the religious idea an open question. For the present we are not concerned directly with the origin of the religious idea, but with an examination of some of the causes that have served to perpetuate it, and to trace the influence in the history of religion of states of mind, both personal and collective, that are now admittedly abnormal or pathological in character. The legitimacy of the enquiry cannot be questioned. As to its value and significance, that every reader must determine for himself.
One may put the essential idea of the following pages in a sentence:—Given the religious idea as already existing, in what way, and to what extent has its development been affected by forces that are not in themselves religious, and which modern thought definitely separates from religion?
Under civilised and uncivilised conditions we find religious beliefs constantly associated with various forces—social, ethical, and psychological. Very seldom is there any serious attempt to separate them and assign to each their respective value; nor, indeed, is the task at any time an easy one. The difficulty is made the greater by the way in which writers so enlarge the meaning of "religion" that it is made to include almost everything for which one feels admiration or respect. This practice is neither helpful nor accurate. Human nature under all aspects of intellectual conviction presents the same fundamental characteristics, and a definition to be of value, while of necessity
inclusive, must also be decisively exclusive. It must unite, but it must also separate. And many current definitions of religion, while they may bear testimony to the amiability of those who frame them, are quite destitute of scientific value. In any case, the association of the religious idea with non-religious forces is a fact too patent to admit of denial; and the important task is to determine their reciprocal influence. In actual life this separation has been secured by the development of the various branches of positive thought—ethics, psychology, etc., all of which were once directly under the control of religion. What remains to be done is to separate in theory what has already been separated in fact, with such additions as a more critical knowledge may suggest as advisable.
Far more suggestive, however, than the association of religion with what we may call the normal social forces, is its connection with conditions that are now clearly recognised as abnormal. From the earliest times we find the use of drugs and stimulants, the practice of fasting and self-torture, with other methods of depressing or stimulating the action of the nervous system, accepted as well-recognised methods of inducing a sense of religious illumination, or the feeling that one is in direct communion with a supernatural order of existence. Equally significant is the world-wide acceptance—right up to recent times—of purely pathological states as evidence of supernatural intercourse. About these two sets of facts there can be no reasonable doubt. Over and over again we can observe how the promptings of disease are taken for the voice of divinity, and men and women who to-day would be handed over to the care of the physician hailed as an
incarnation of deity. In modern asylums we find one of the commonest of delusions to be that of the insane person who imagines himself to be a specially selected instrument of deity. In such instances the causal influence of pathological conditions is admitted. On the other hand, we have belonging to the more normal type the person who claims a supernatural origin for many of his actions and states of mind. And between these two extremes lie a whole series of gradations. They exist in all stages of culture, and it is difficult to see by what rule of logic or of experience one can say where the normal ends and the abnormal begins. If we assume the inference of the normal person concerning the origin of his mental states to be correct, it seems difficult to deny the possibility of those of the insane person having a similar origin, although distorted by the influence of disease. If, on the other hand, we say the insane person is wholly wrong as to the origin of his mental states, may we not also assume that the normal person has likewise erred as to the cause of his emotions or ideas?