As I have already indicated, it is necessary in dealing with a matter as dramatic and fatal as this whole question of ultimate reality, to risk the annoyance of repetition. It is important to go over our tracks again so that no crevice should be left in this perilous bridge hung across the gulf. Reason, then, working in isolation, provides us with the recognition of an ultimate universal "subject" or, in metaphysical language, with an "a priori unity of apperception." Simultaneously with this recognition, self-consciousness, also working in isolation, provides us with the recognition of an universal self-conscious "monad" or "cosmic self" which is not only able but is compelled to think of itself as its own object.

Both these recognitions imply a consciousness which is outside time and space; but while the first, the outer edge of thought, can only be regarded as "pure subject," the second can be regarded as nothing else than the whole universe contemplating itself as its own object.

In the third place the complex vision, working with all its attributes together, provides us with the recognition of a personal or empirical self which is the real "I am I" of our integral soul. This personal self, or actual living soul, must be thought of as possessing some "substratum" or "vanishing point of sensation" as the implication of its permanence and continuous identity. This "vanishing point of sensation," or in other words this attenuated form of "matter" or "energy" or "movement," must not be allowed to disappear from our conception of the soul. If it were allowed to disappear, one of the basic attributes of the soul's complex vision, namely its attribute of sensation, would be negated and suppressed.

Directly we regarded the "I am I" within us as independent of such a "vanishing point of sensation" and as being entirely free from any, even from the most attenuated form, of what is usually called "matter," then, at that very moment, the complex vision's revelation would be falsified. Then, at that very moment, the integrity of the soul would dissolve away, and we should be reduced to a stream of sensations with nothing to give them coherence and unity, or to that figment of abstract self-consciousness, "thought-in-itself," apart from both the thing "thinking" and the thing "thought." The soul, therefore, must be conceived if we are to be true to the original revelation of the complex vision, as having an indefinable "something" as its substratum or implication of identity. And this something, although impossible to be analysed, must be regarded as existing within that mysterious medium which is the uniting force of the universe. The soul must, in fact, be thought of as possessing some sort of "spiritual body" which is the centre of its complex vision and which, therefore, expresses itself in reason, self-consciousness, will, sensation, instinct, intuition, memory, emotion, conscience, taste, and imagination. All this must necessarily imply that the soul is within, and not outside, time and space. It must further imply that although the physical body, which the soul uses at its will, is only one portion of the objective universe which confronts it, this physical body is more immediately connected with the soul's complex vision and more directly under the influence of it than any other portion of the external universe.

The question then arises, can it be said that this "vanishing point of sensation," this "substratum" composed of "something" which we are only able to define as the limit where the ultimate attenuation of what we call "matter" or "energy" passes into unfathomableness, this centre of the soul, this "spiritual body," this invisible "pyramid base" of the complex vision, is also, just as the physical body is, a definite portion of that objective universe which we apprehend through our senses?

The physical body is entirely and in all its aspects a portion of this objective universe. Is the substratum of the soul a portion of it also? I think the answer to this question is that it is and also is not a portion of this universe. This "spiritual body," this "vanishing point of sensation," which is the principle of permanence and continuity and identity in the soul, is obviously the very centre and core of reality. Being this, it must necessarily be a portion of that objective world whose reality, after the reality of the soul itself, is the most vivid reality which we know.

The complex vision demands and exacts the reality of the objective world. The whole drama of its life depends upon this. Without this the complex vision would not exist. And just as the complex vision could not exist without the reality of the objective world, so the objective world could not exist without the reality of the complex vision. These two depend upon one another and perpetually recreate one another.

Any metaphysical system which denies the existence of the objective world, or uses the expression "illusion" with regard to it, is a system based, not upon the complex vision in its entirety, but upon some isolated attribute of it. The "substratum" of the soul, then, must be a portion of the objective world so as to give validity, so to speak, and assurance that this objective world with its mysterious medium crowded with living bodies and inanimate objects is not a mere illusion. But the "substratum" of the soul must be something else in addition to this. Being the essential meeting-point between what we call thought on the one hand, and what we call "matter" or "energy" on the other, the "substratum" of the soul must be a point of perpetual movement where the life of thought passes into the life of sensation.

The "substratum" of the soul must be regarded as the ultimate attenuation of "matter" on the one hand, and on the other as perpetually passing into "mind." For since it is the centre-point of life it must be composed of a stuff woven, so to speak, out all the threads of life. That is to say it must be the very centre and vortex of all the contradictions in the universe.

Since the "substratum" or "spiritual body" of the soul is the most real thing in the universe it must, in its own nature, partake of every kind of reality which exists in the universe. It must therefore be, quite definitely, a portion of the objective world existing within time and space. But it must also be the ultimate unity of "the life of thought." And since, as we have seen, it is within the power of reason and self-consciousness to isolate themselves from the other attributes of the soul and to project themselves outside of space and time, it must be the perpetual fatality of the "substratum" of the soul to recall these wanderers back to the true reality of things, which does not lie outside of space and time but within space and time, and which must justify time and space as something very different from illusion.