practical life. The world and the human spirit, for Plotinus, were simply manifestations of God. He taught that, as light issues from the sun and proceeds forth on its way, growing gradually dimmer till it passes into darkness, so the world of thought and thing has no true being apart from God, from whom it proceeded and to whom it returns. Spiritual monism found in Alexandria a congenial home. Blending there with oriental mysticism it produced a crop of gnostic speculative systems, in all of which Acosmism or a denial of the world was the keynote. Whether the problem was conceived in terms of being or of value, the result was the same. The world has no true being. Its appearance of solidity is a sham. It has no value. Compared with God, it is negligible. It is but the shadow cast by the eternal sun.

The monophysite tenets traceable to monism will be considered in detail in later chapters. Here our concern is to show that monism supplies the metaphysical principle on which the heresy is based; that, as dualism provides the a priori of Nestorian thought, monism provides the a priori of monophysite thought.

CHRISTOLOGICAL MONISM—MONOPHYSITISM

The essential doctrine of monophysitism is the assertion of the absolute numerical unity of the person of Christ. It carries to extremes its denial of the dual personality maintained by the Nestorians. All vestiges of duality were banished from His being; there were not two persons: there were not even two natures. There was in Christ only the one nature of God the Word. The human nature at the incarnation was absorbed into the divine. It no more has substantive existence than has the world in a pantheistic system. This is monism in terms of personality. Its presuppositions are those of a mind imbued with an all-powerful feeling for unity. It is faced with the problem of reconciling God and the world in the person of Jesus Christ. It brings to that problem a prejudice against the real being and the real value of the world. Hence it is led to draw the false conclusion that humanity, which is part of the world, is not a permanent element in the highest truth; that even perfect humanity, humanity representative of all that is noblest in the race, cannot be allowed true existence in the Ideal.

Monism abandons the universal relation by abandoning one or other of the terms to be related. Monophysitism cuts a similar knot in a similar fashion. It jettisons redemption by excluding from the Redeemer all kinship with that which He came to redeem. Nominally admitting human nature into union with deity, it destroys the reality of that transaction at a stroke by making the two natures identical. So the incarnation, for the monophysite, becomes a myth; no change in the nature of the Logos took place at it, and, consequently, no change in the nature of the Man Christ Jesus.

We may trace the likeness between the cosmic and the Christological problems still further. Monism is forced to attempt to give some account of the world's apparent reality. Similarly monophysitism had to try to explain those facts of Christ's life which on the face of the Gospel narrative are human and normal. The explanation offered is essentially the same in both systems. The monist asserts that the world exists only in the mind of the thinker. It is an illusion of the senses. The duty of the philosopher is to overcome the illusion by turning away from the world of sense and fixing his mind on true being; by ascesis and contemplation he endeavours to attain the ecstatic state, in which the illusion of the world's reality disappears, and the potential identity of man with the universal spirit becomes actualised in experience. Similarly, for the monophysite, the humanity of Christ was a creation of the senses. Christ's body was a phantom, and His human mind simply an aspect of Him. They were impressions left on the minds of His contemporaries. Having no substantive existence, no reality in fact, they were to be ignored in Christological dogma. They were not to be considered as part of the true Christ; they were not to be worshipped. No spiritual value attached to them. They were hindrances rather than helps to the religion that aimed at entire abandonment of self and absorption in the divine.

THE THIRD SOLUTION OF THE COSMIC PROBLEM—IDENTITY IN DIFFERENCE

We come now to the third and last solution of the cosmic problem. As we develop it, we shall endeavour to show that it supplies that metaphysical idea which forms the basis of catholic Christology. The two previous solutions failed. They do not satisfy the philosopher and they mislead the theologian. The one separates God from the world; the other merges them. Thus both, in effect, abandon the original enterprise. They destroy the relation instead of expressing it. The concepts both of co-existence and of identity have proved fruitless in the speculative problem, and in Christology have given rise to heresy. The third school of thought takes as its starting point neither God, nor the world, nor the two as co-existing, but the relation of the two. It makes that relation such that the terms related are preserved in the relation. Neither identity nor difference is the full truth, but identity in and through difference. God is not the world, nor is the world God. God is, and the world is. Each are facts. In their separateness they are not true facts. It is only as we conceive the two in their oneness, a supra-numerical oneness, that we can give their full value to each. The world is God's world; therefore it has being and value. The cosmic relation then is expressed not by an "and," nor by an "is," but by an "of." The God "of" the world is the key concept that unlocks the doors of the palace of truth.

It was in the prominence given to this concept that Aristotle's system made a great advance on that of his predecessor. Plato had established a world of ideas with the idea of the Good as its centre, but he left it unrelated to the world of experience. Aristotle insisted on relating the ideal and the real. His concept of relation was that of form and matter. The world apart from God is matter apart from form. It has only potential reality. When it becomes united to its form, it becomes actual. Its form makes it a fact—what it has in it to be. Aristotle conceives different grades of being. Unformed matter is the lowest of these grades, and God the highest. Each grade supplies the matter of which the next highest grade is the form. Ascending the scale of being at last we reach pure form. Thus the ladder of development is constructed by which the world rises to its realisation in God. Aristotle gave to humanity the conception of a God who transcends the world, and yet is immanent in it, as form is in matter. Thus Greek philosophy in Aristotle attained that spiritual monotheism which supplied the foundation for the edifice of Christian doctrine.

The effect of Aristotle's teaching was felt by all the ecclesiastical parties in the fifth century. As we shall see in a later chapter, some of the subsidiary elements of his philosophy are reflected in monophysitism. The dominant ideas, however, of the system, the conception of God and the world and the relation between them, were taken over by the catholic theologians, and incorporated into their Christology. We need not here inquire whether Aristotle's influence was direct or indirect. No doubt many of the theologians who constructed Christian doctrine had read his works. Whether that is so or not, they must have unconsciously assimilated his central doctrine. It was common property. The determination to keep God a reality and the world a reality and yet relate the two became the controlling motive of their thinking.

Aristotle in theory and application of theory has always a feeling for fact. The individual thing and the world of individual things are, for him, never negligible. Realised matter, life, the human spirit, human nature, are actualities and have their