This idea of Christ, as we know, was gradually formed in the Christian Church, and did not become Orthodox until after many struggles. First came the question whether the Deity of Christ [pg 203] was equal or subordinate to that of the Father. Hardly had the Orthodox doctrine triumphed over that of subordination, against those who denied the equal Deity, than it was obliged to turn round and contend against those on the other side, who denied the humanity of Christ altogether. The Ebionites considered Jesus as a mere man. Theodotus, in the year 200, taught the same, with Artemon and Praxeas. In the next century the Arians and Sabellians opposed Orthodoxy from opposite sides,—the one confounding the persons of the Godhead, and the other dividing the substance. So for several centuries the pendulum of opinion swung from one side to the other before it rested in the golden mean of Orthodoxy.

The Nestorians separated the two natures of Christ, and maintained that his Divinity consisted only in the indwelling of God. But scarcely had Nestorius been banished for separating the two natures than Eutyches plunged into heresy on the other side, by confounding them together. This was the Monophysite heresy; and no sooner was this overthrown, and it was decided to be wrong to say that Christ had only one nature, than others began to contend that he had only one will. These were the Monothelites. But through all these controversies, the main doctrine of Orthodoxy continues to shine out luminous and distinct, asserting that Christ combines the fulness of Deity and the fulness of Humanity.