It is therefore a perpetual witness to the truth that the idea of communism is the inevitable expression of the complex vision that this idea should, more than other idea in the world, divide the souls of men into opposite camps. If the idea of communism were not the inevitable expression of the philosophy of the complex vision as applied to human life it would be an idea with regard to which all human souls would hold infinitely various opinions. But this is not the case. In regard to the idea of communism we do not find this infinite variety of opinion. We find, on the contrary, a definite and irreconcilable duality of thought. Human souls are divided on this matter not, as they are on other matters, into a motley variety of convictions but into two opposite and irreconcilable convictions, unfathomably hostile to one another. There is no other question, no other issue, about which the souls of men are divided so clearly and definitely into two opposite camps. The question of the existence of a "parent of the universe" does not divide them so clearly; because it always remains possible for any unbeliever in a spiritual unity of this absolute kind to use the term "parent," if he pleases, for that incomprehensible "substance" under the dominion of space and time which takes the triple form of the "substance" out of which the substratum of the soul is made, the "substance" out of which the "objective mystery" is made, and the substance out of which is made the surrounding "medium" which holds all personal souls together. The question of the mortality or the immortality of the soul does not divide them so clearly; because such a question is entirely insoluble; and a vivid consciousness of its insolubility accompanies all argument. The question of race does not divide them so clearly; because both with regard to race and with regard to class the division is very largely a superficial thing, dependent upon public opinion and upon group-consciousness and leaving many individuals on each side entirely unaffected. The question of sex does not divide them so clearly; because there are always innumerable examples of noble and ignoble treachery to the sex-instinct; not to speak of a certain intellectual neutrality which refuses to be biased. The idea of communism is on the contrary so profoundly associated with the original revelation of the complex vision that it must be regarded as the inevitable expression of all the attributes of this vision when such attributes are reduced to a rhythmic harmony. That this is no speculative hypothesis but a real fact of experience can be proved by any sincere act of personal introspection.