Although fully divine, Jesus was fully human as well. Had he not been, his life and death would have no redemptive value whatsoever. That God himself passed the death sentence on our sin and disobedience, then came to suffer that sentence himself, after having lived a perfect, sinless life, trading his reward for our punishment is the Gospel in its most concise form. For his sinless life to matter, and be sufficient to earn God’s favor, he had to do it as a man, not a divine being for whom nothing was very difficult.
This is not easy to comprehend, and yet it is the heart of the mystery of salvation. It is no wonder that the early Church worked hard to protect this truth from variants that would have tilted the nature of Christ into one of two heresies: Nestorianism (and several other related heresies) taught that Jesus was fully human, and though certainly specially anointed by God, was not fully God as well. On the other hand Docetism (and several other similar teachings) taught that Jesus was fully God, but only masquerading as human, not really subject to the sorrows, temptations, and trials of human beings.
Docetism seems to have run its course””we don’t hear many people today insisting that Jesus was God and only appeared to be human. But the family of Nestorian views is another matter. It is the preferred stance of the modern world””Jesus was a fully human being, and although given special gifts and grace by God, he was still just human, a first century Semitic man of his time, limited and even (some assert) flawed.