“Also, you see here the Jaradic colours--the crimson, green and blue--the shades between, the iridescence and the shadows. Had you been on the other side you wouldn't have seen one of them; they are not precisely our own colours, but their equivalents on this side of the Spot. “In the final analysis, as I said before, it gets down to ether, to speed and vibration--and still at last to the perceptive limitations of our own earthly five senses. Just stop and consider how limited we are! Only five senses--why, even insects have six. Then consider that all matter, when we get to the bottom of it, is differentiated and condensed ether, focused into various mathematical arrangements, as numberless as the particles of the universe. Of these our five senses pick out a very small proportion indeed. “This is one way to account for the Blind Spot. It may be merely another phase of the spectrum--not simply the unexplored regions of the infra-red or the ultra-violet, but a region co-existent with what we normally apprehend, and making itself manifest through apertures in what we, with our extremely limited sense-grasp, think to be a continuous spectrum. I throw out the idea mainly as a suggestion. It is not necessarily the true explanation. “Let us go a bit farther. Remember, we are still upon the earth. And that we are still in San Francisco, although all the while we are also in the Mahovisal. This is 288 Chatterton Place, and at the same time it is the Temple of the Bell. It might be a hundred or a thousand other places just as well, too, if my hypothesis is correct; which we shall see. “Now, what does this mean? Simply this, gentlemen, that we five-sensed people have failed to grasp the true meaning of the word 'Infinity.' We look out toward the stars, fancying that only in unlimited space can we find the infinite. We little suspect we ourselves are infinity! It is only our five senses that make us finite. “As soon as we grasp this the so-called spiritual realm becomes a very substantial fact. We begin to apprehend the occult. Our five-sensed world is merely a highly specialized phase of infinity. Material or spiritual--it is all the same. That's why we look on the Thomahlians as occult, and why they consider us in the same light. “It is strictly a question of sense perception and limitations, which can be covered by the word, 'viewpoint.' Viewpoint--that is all it amounts to. “There is no such thing as unreality; but there is most certainly such a thing as relativity, and all life is real. “Of course I knew nothing of this until the discovery of the Blind Spot. It will, I think, prove to be one of the greatest events in history. It will silence the sceptics, and form a bulwark for all religion. And it will make us all appreciate our Creator the more.” The professor stopped. For some moments there was silence. “What are we to do now?” asked Harry.