For this image of an arrow-head of focussed flame which is in constant danger of being dispersed as the flames recede from one another and are blown backwards is only a symbolic way of indicating how difficult it is to pierce with our complicated instrument of research the vast mystery which surrounds us. All this is mere pictorial metaphor; but in visualizing the human soul as a moving arrow-head, composed of flickering flames that only now and then combine into a sharp point, while at other times the wind drives them apart and bends them back, I am suggesting that the ultimate reality of things is a state of confused movement continually becoming a state of concentrated movement. I am suggesting that the secrets of life only yield themselves up to a movement of desperation. I am suggesting that the spirit of creation is also the spirit of destruction, and that the real object of the energy of creation is to pierce with its burning light the darkness of the objective mystery. As proof of the necessity of keeping this apex-thought in constant poise, let me reiterate one or two of the philosophical disasters which result from a cessation of its rhythmic function. When the reason, for instance, usurps the whole field and acts in isolation from the imagination and the intuition, it tends to persuade us to deny the very existence of that deepest and most vivid reality of all, the handle of our spear-head, the base of our pyramid, the mysterious entity within us, which we have come, following the traditions of the centuries, to name the "soul." And not only does the soul disappear when the reason thus isolates itself, but another primary revelation of the complex vision, I mean that half-created, half-discovered object of the senses popularly called "matter," disappears with it. Man's self-consciousness is thus left suspended "in vacuo" with no concrete reality within it and no concrete reality outside it; and "thought-in-the-abstract" becomes the only truth.