All these material designs are more or less radio-active--namely, changing into other elements, but some, like radium, polonium, &c., are active to an extraordinary extent. Each molecule or atom may be looked upon as an _aperture_, more or less open, through which we have flowing the equivalent of what may be called a leak from the Infinite, the changing of one element into another being represented by the change of shape or activity of that aperture. Countless ages ago these apertures were, by evolution, growing more and more complex in shape, but when the limit of complexity was reached and the _Apex_ was passed, an adaptation, somewhat analogous to death in the animal and vegetable, must have come into play, with the result that these apertures are now becoming more and more simple in their shape and activity. The Infinite referred to above may be diagnosed by some as being in the fourth dimension of space, or it may even be comprised within the Ether of our known three dimensions, for the discovery of radio-activity has enabled us to see that Ether is not only as dense as iron, but millions of times denser than that metal, every cubic foot, or probably cubic inch, being capable of supplying millions of horse-power if it could only be tapped. A homely simile of this leak from the Infinite may be seen in a glass of aerated water, where an irregularity of surface, a crumb of bread, or a grain of sand becomes the means by which carbonic-dioxide escapes from the interstices of the water. Radio-active substances then are really forges for forming new structures of matter or forms of energy, rather than quarries from which they are cut, and we seem to get a glimpse of the origin of life, perhaps itself the cause of "retrogression" in the material, coming through from the Reality, the Infinite beyond the physical Universe. Life and its processes are well symbolised by a triangle, the base of which is the "Divide" between the Real and its reflections or shadows on the Material plane, and through which all energy percolates. One side of the triangle represents anabolism, or the process of building up, and the other katabolism, the process of breaking down, and at the Apex is the Mystical "Terror of the Threshold," the "Ainsoph" (_vide_ frontispiece), which introduced _sacrificial_ death to the Physical, as an adaptation in the evolution of, and for the good of, the Human race. With the death of the Physical, the rending of the Veil, as we have seen in View Two, all Shadows and Reflections disappear, and, in place of "seeing as through a glass darkly," the Soul has its true birth, and at last enters upon its heritage in the Divine Life, face to face with the Reality, the Good, the Beautiful, and the True. VIEW FOUR LOVE IN ACTION