error, to which the Church, even in apostolic days, was exposed, were docetism and ebionitism. These are the elemental heresies. All the later Christological heresies are refinements of one or other of these two. They constitute the extremes of Christological thought: between them runs the via media of orthodoxy. Each of the two sees but one aspect of the two-fold life of Christ. Docetism lays an exclusive emphasis on His real divinity, ebionitism on His real humanity. Each mistakes a half truth for a whole truth.

The docetists denied that Jesus Christ had come in the flesh. His body, they taught, was an apparition. He ate and drank, but the physical frame received no sustenance. He appeared to suffer, but felt no pain. The reality behind the semblance was the divine spirit-being, who conjured up the illusion in order to elevate the thoughts of mankind. This docetic theory commended itself to many of the Greek Christians. They were familiar with the notion of "the gods coming down to them in the likeness of men." Greek mythology abounds in instances of docetic incarnations. The gods of the popular religion constantly assumed visible form during their temporary manifestations.

The ebionites threatened the Faith from the opposite quarter. They taught that Christ was real man and only man. According to them, the whole value of His life and work lay in His moral teaching and His noble example; there is no mystery, no contact of divine and human in Christ; what He attained, we all may attain. The ebionites were recruited from the Jewish element in the Church. The rigid monotheism of the Jews made it hard for them to conceive an intermediary between God and man; they were naturally disposed to embrace a humanistic explanation of Christ.

Docetism was elaborated by Valentinus, Manes and other gnostics and adopted into their systems, while ebionitism provided the basis for the Christologies of Paul of Samosata, of the Photinians and Adoptionists. In contact with these heresies orthodox beliefs, originally fluid, gradually hardened. The dogma "Christus deus et homo" had from the beginning been held in the Church. Its full implications were not realised and formulated until the conflict with error came. The controversies of the third and fourth centuries threw into bold relief the unity of the person and the perfection of the divinity and of the humanity.

THE PROBLEM OF THE HYPOSTATIC UNION

The manner of the hypostatic union then became an urgent problem. The Church of the fifth century was called upon to attempt a solution. Any reading of the Gospels compelled the recognition of divine and human elements in Christ; but speculative theology found it difficult to reconcile that fact with the equally important fact of the unity of person.

The theologians of the previous century had bequeathed little or no guidance. The fifth-century Christologians were pioneers in an unmapped region. Athanasius' great treatises on the incarnation are hardly more than eloquent defences of the true deity and true humanity of Christ. They contain little or no constructive Christology. Their theme is, autòs enênthrópêsen, hína hêmeis theôpoiêthômen. He maintains the fact, but does not deal with the "how." He uses the phrase "natural union" (hénôsis physiké), but does not attempt to define the mode of that union.

APOLLINARIANISM

Apollinaris was, as far as we know, the first theologian to approach this subject. We may note in passing that, though he was bishop of Laodicea in Syria, Alexandria was his native place. His father was an Alexandrian, and he himself had been a friend of Athanasius. The fact of his connection with Alexandria deserves mention, because his doctrine reflects the ideas of the Alexandrian school of thought, not those of the Syrian. Apollinaris set himself to attack the heretical view that there were two "Sons"—one before all time, the divine Logos, and one after the incarnation, Jesus Christ. In doing so he felt constrained to formulate a theory of the union of natures. He started from the Platonic division of human nature into three parts, rational soul, animal soul, and body. He argued that in the statement "the Logos became flesh," "flesh" must mean animal soul and body. He urged in proof that it would be absurd to suppose the Logos conditioned by human reason; that rational soul was the seat of personality, and that if it were associated with the Logos, it would be impossible to avoid recognising "two Sons." He expressly asserted that the humanity of Christ was incomplete, contending that this very defect in the human nature made possible the unity of His person. According to Apollinaris, then, the union was a composition. The Logos superseded the human reason, and was thus united to body and animal soul.

Apollinarianism was a form of docetism. In ascribing imperfection to the human nature of Christ it eo ipso denied its reality. Apollinaris, in fact, said of Christ's reason what the early docetists said of His body. The system is more ingenious than convincing. It is highly artificial. It provides no intellectual basis for a living faith in an incarnate Christ. The theory, however, was very influential in its day, and was intimately connected with the rise of monophysitism. Eutyches, the "father of the monophysites," was condemned by a local synod at Constantinople in A.D. 448 on the ground that he was "affected by the heresy of Valentinus and Apollinaris."[1] Harnack goes so far as to say that "the whole position of the later monophysites, thought out to all its conceivable conclusions, is already to be found in Apollinaris." Apollinarianism was condemned at the second general council, and there the Church made her first declaration, a negative one, on the subject of the hypostatic union. In conflict with the heresies which arose in the next two generations, she evolved a positive statement of the truth.

THE NESTORIAN REACTION

Opposition to Apollinarianism gave rise to the Nestorian heresy. The original ebionitism had died away, but its spirit and central doctrine reappeared in Nestorianism. Nestorianism might be described as ebionitism conforming to the creeds of Nicaea and Constantinople. The leaders of the opposition to the Apollinarists of the fifth century were their own Syrian countrymen whose headquarters was at Antioch. The Antiochians differed from the Apollinarians in the starting-point of their Christology and in the controlling motive of their thought. While Apollinaris had constructed his Christology on the basis of the doctrine of the Trinity, the Antiochians started from the formula "perfect alike in deity and humanity." The reasonings of Apollinaris were governed by the thought of redemption. The fundamental question of religion for him was, "How can the closest union between divine and human be secured?" The tendency of the Antiochians, on the other hand, was to neglect the interests of Soteriology and to emphasize the ethical aspect of Christ's life and teaching. They put in the background the idea of the all-creating, all-sustaining Logos, who took man's nature upon Him and in His person deified humanity. Their thought centred on the historic Christ, the Christ of the evangelists. They did not revert to crude ebionitism, but they explained the Nicene creed from an ebionitic stand-point. They maintained as against the Apollinarians the completeness of Christ's human nature; with equal vigour they maintained the essential deity of the Logos. The "poverty" (ebionitism) of their doctrines consisted in their paltry view of the hypostatic union. The union, according to the Nestorians, was subsequent to the conception of Jesus. It was not a personal, but a moral union. It was a conjunction