beings know one another? By their bounding solids. In other words, my soul speaks to yours through the medium of our minds and bodies. "That is the common phrase? Quite so; but I am using it in an absolute physical sense. A line can only be aware of another line at a point of contact; a plane of another plane at the line where they cut; a cube of another cube at the surface common to both; and a soul of another soul where their ideas are in conjunction. "I do want you to grasp this with every fibre in your being; I believe it to be the most important thesis ever enunciated, and you will be proud to learn that it is wholly Brother Cyril's, with no help from me. Hinton, Rouse Ball, and others, laid the foundations; but it was he that put it in such a clear light, and correlated it with occult science. "You must give the honour to the Mahathera Phang!" interjected Cyril. "I was proving to him the metaphysical nature of the soul — and he regarded me with so amused a smile that I perceived my asininity. Of course there can be but one order of Nature!" "In any case," continued Iff, "this theory of Cyril's wipes the slate clean of every metaphysical speculation. Good and evil vanish instantly, with Realism and Nominalism, and Free will and [105] Determinism — and all the 'isms' and all the 'ologies'! Life is reduced to mathematical formulae, indeed, as the Victorian scientists rightly wished to do; but at the same time mathematics is restored to her royal pre-eminence as not only the most exact, but the most exalted of the sciences. The intelligible order of things, moreover, becomes natural and inevitable; and such moral problems as the cruelty of organic life return to their real insignificance. The almost comic antinomy between man's size and his intelligence is reduced; and although the mystery of the Universe remains unsolved, at least it is a rational mystery, and neither senseless nor intolerable. "Let us now come down to a simple practical point. Here is a soul anxious to communicate with other souls. He can only do it by obtaining a mind and body. Now you'll notice, taking that cone image of ours again, that any section of it is always one of three regular curves. It would not fit into a square, for example, however you turned it. And so our soul has to look about for some mind which will fit one of his sections. There is a great deal of latitude, no doubt; for the mind grows, and is at first very plastic. But there must be some sort of relation. If I am a wandering soul, and wish to communicate with the soul now manifesting a section of itself as Professor of