Calvin on the Incarnation

The case was certainly desperate, if the Godhead itself did not descend to us, it being impossible for us to ascend. Thus the Son of God behoved to become our Emmanuel, the God with us; and in such a way, that by mutual union his divinity and our nature might be combined; otherwise, neither was the proximity near enough, nor the affinity strong enough, to give us hope that God would dwell with us; so great was the repugnance between our pollution and the spotless purity of God.

(John Calvin, Institutes of the Christian Religion, translated by Henry Beveridge [Grand Rapids: Eerdmans, 1972], II, xii, 1)

Who could do this unless the Son of God should also become the Son of man, and so receive what is ours as to transfer to us what is his, making that which is his by nature to become ours by grace? Relying on this earnest, we trust that we are the sons of God, because the natural Son of God assumed to himself a body of our body, flesh of our flesh, bones of our bones, that he might be one with us; he declined not to take what was peculiar to us, that he might in his turn extend to us what was peculiarly his own, and thus might be in common with us both Son of God and Son of man. (Ibid., II, xii, 2)

Therefore, our Lord came forth very man, adopted the person of Adam, and assumed his name, that he might in his stead obey the Father; that he might present our flesh as the price of satisfaction to the just judgment of God, and in the same flesh pay the penalty which we had incurred. Finally, since as God only he could not suffer, and as man only could not overcome death, he united the human nature with the divine, that he might subject the weakness of the one to death as an expiation of sin, and by the power of the other, maintaining a struggle with death, might gain us the victory. Those, therefore, who rob Christ of divinity or humanity either detract from his majesty and glory, or obscure his goodness. (Ibid., II, xii, 3)

The Son of God descended miraculously from heaven, yet without abandoning heaven; was pleased to be conceived miraculously in the Virgin’s womb, to live on the earth, and hang upon the cross, and yet always filled the world as from the beginning. (Ibid., II, xiii, 4)

Calvin on the Incarnation