Whether we examine the Fairy-Faith as a whole or whether we examine specialized parts of it like those relating to the smallness of fairies, to changelings, to witchcraft and magic, to exorcisms, to taboos, and to food-sacrifice, in all cases comparative folk-lore shows that the beliefs composing it find their parallels the world over, and that fairy-like beings are objects of belief now not only in Celtic countries, but in Central Australia, throughout Polynesia, in Africa, among American Red Men, in Asia generally, in Southern, Western, and Northern Europe, and, in fact, wherever civilized and primitive men hold religious beliefs. From a rationalist point of view anthropologists would be inclined to regard the bulk of this widespread belief in spiritual beings as being purely mythical, but for us to do so and stop there would lead to no satisfactory solution: the origin of myth itself needs to be explained, and one of the chief objects of our study throughout the remainder of this book is to make an attempt at such an explanation, especially of Celtic myth.
Again, if we examine all fairy-like beings from a certain superficial point of view, or even from the mythological point of view, it is easy to discern that they are universally credited with precisely the same characters, attributes, actions, or powers as the particular peoples possess who have faith in them; and then the further fact emerges that this anthropomorphosing is due directly to the more immediate social environment: we see merely an anthropomorphically coloured picture of the whole of an age-long social evolution of the tribe, race, or nation who have fostered the particular aspect of this one world-wide folk-religion. But if we look still deeper, we discover as background to the myths and the social psychology a profound animism. This animism appears in its own environment in the shading away of the different fairy-like beings into spirits and ghosts of the departed. Going deeper yet, we find that such animistic beliefs as concern themselves exclusively with the realm of the dead are in many cases apparently so well founded on definite provable psychical experiences on the part of living men and women that the aid of science itself must be called in to explain them, and this will be done in our chapter entitled Science and Fairies.
So far it ought to be clear that already our evidence points to a very respectable residue in the experiences of percipients, which cannot be explained away—as can the larger mass of the evidence—as due to ethnological, anthropomorphic, naturalistic, or sociological influences on the Celtic mind; and for the present this must be designated as the x or unknown quantity in the Fairy-Faith. In [chapter xi] this x quantity, augmented by whatever else is to be elicited from further evidence, will be specifically discussed.
These points of view derived from our anthropological examination of the chief parts of the evidence presented by the living Fairy-Faith will be kept constantly before us as we proceed further; and what has been demonstrated anthropologically in this chapter will serve to interpret what is to follow until chapter xi is reached. With this tentative position we pass to Section II of this study, and shall there begin to examine, as we have just done with their modern Fairy-Faith, the ancient Fairy-Faith of the Celts.