Something of the sort may exist in our psychic arrangements. One can well imagine that there is a dividing line, like the water edge, this line depending upon what we vaguely call a higher rate of vibrations. Taking the vibration theory as a working hypothesis, one could conceive that by raising or lowering the rate the creatures could move from one side to the other of this line of material visibility, as the tortoise moves from the water to the land, returning for refuge to invisibility as the reptile scuttles back to the surf. This, of course, is supposition, but intelligent supposition based on the available evidence is the pioneer of science, and it may be that the actual solution will be found in this direction. I am alluding now, not to spirit return, where seventy years of close observation has given us some sort of certain and definite laws, but rather to those fairy and phantom phenomena which have been endorsed by so many ages, and still even in these material days seem to break into some lives in the most unexpected fashion.

Victorian science would have left the world hard and clean and bare, like a landscape in the moon; but this science is in truth but a little light in the darkness, and outside that limited circle of definite knowledge we see the loom and shadow of gigantic and fantastic possibilities around us, throwing themselves continually across our consciousness in such ways that it is difficult to ignore them.

(..)

Taking a large number of cases which lie before me, there are two points which are common to nearly all of them. One is that children claim to see these creatures far more frequently than adults. This may possibly come from greater sensitiveness of apprehension, or it may depend upon these little entities having less fear of molestation from the children. The other is, that more cases are recorded in which they have been seen in the still, shimmering hours of a very hot day than at any other time. "The action of the sun upon the brain," says the sceptic. Possibly--and also possibly not. If it were a question of raising the slower vibrations of our surroundings one could imagine that still, silent heat would be the very condition which might favour such a change. What is the mirage of the desert? What is that scene of hills and lakes which a whole caravan can see while it faces in a direction where for a thousand miles of desert there is neither hill nor lake, nor any cloud or moisture to produce refraction? I can ask the question, but I do not venture to give an answer.

(..)

One may well ask what connection has this fairy-lore with the general scheme of psychic philosophy? The connection is slight and indirect, consisting only in the fact that anything which widens our conceptions of the possible, and shakes us out of our time-rutted lines of thought, helps us to regain our elasticity of mind, and thus to be more open to new philosophies. The fairy question is infinitely small and unimportant compared to the question of our own fate and that of the whole human race."

(Konana Doila The Coming of the Fairies, patiesi aizgrābjošs gabals)