These facts render it impossible to regard the connection between Alexandria and monophysitism as fortuitous. They further suggest that Neo-Platonism was the connecting link. Such in fact it was. Monophysitism, we might almost say, was Neo-Platonism in Christian dress. The ethos of the two systems is the same, and the doctrinal resemblance is marked. It was natural that the home of pagan mysticism should cradle the kindred system of heretical Christian mysticism.
The representative figure amongst the Neo-Platonists is Plotinus. His comprehensive mind gathered up the main threads of Alexandrian thought, and wove them into the fabric of a vast speculative system. The system is as much a religion as a philosophy. It is the triumph of uncompromising monism. The last traces of dualism have been eradicated. God, for Plotinus, is true being and the only being. He is all and in all. God is an impersonal Trinity, comprising the One, the cosmic reason and the cosmic soul. The One is primal, ineffable, behind and beyond all human experience. All we know of Him is that He is the source and union of reason and soul. Creation is effected by a continuous series of emanations from God. Emanation is not an arbitrary act of divine will; it is a necessary consequence of the nature of the One. God must negate Himself, and the process is creation. The further the process of negation is carried, the less reality does the created object possess. Last in the scale comes matter, which has no self-subsistence, but is the absolute self-negation of God. We referred in the last chapter to Plotinus' favourite illustration. We may be allowed, perhaps, to repeat it here. As light, he says, issues from the sun and grows gradually dimmer, until it passes by imperceptible degrees into the dark, so reason emanates from God and, passing through the phases of nature, loses its essence gradually in its procession, until finally it is derationalised and becomes its opposite.
Human souls are at an intermediate stage of this cosmic process. Like the ray of light which touches both sun and earth, they have contact with God and with matter. They stand midway in creation. They are attracted upwards and downwards. Reason draws them to God; sense chains them to earth. Their position decides their duty. (Here the philosophy becomes a religion). The duty of man is to break the sensuous chains and set the soul free to return to its home in God. This return of the soul to God is attained by the path of knowledge. The knowledge that frees is not speculative; for such enhances self-consciousness. It is immediate consciousness indistinguishable from unconsciousness. It is intuitive knowledge. It is vision in which the seer loses himself, and what sees is the same as what is seen. It is the absorption of the soul in the world reason, and so with God.