"It was also imperative that he who was to become our Redeemer be true God and true man. It was his task to swallow up death. Who but Life could do this? It was his task to conquer sin. Who but very Righteousness could do this? It was his task to rout the powers of world and air. Who but a power higher than world and air could do this? Now where does life or righteousness, or lordship and authority of heaven lie but with God alone? Therefore our most merciful God, when he willed that we be redeemed, made himself our Redeemer in the pweron of his only-begotten Son . . . . Since neither as God alone could he feel death, nor as man alone could he overcome it, he coupled human nature with divine that to atone for sin he might submit the weakness of the one to death; and that, wrestling with death by the power of his other nature, he might win victory for us. Those who despoil Christ of either his divinity or his humanity diminish his majesty and glory, or obscure his goodness."
John Calvin, Institutes of the Christian Religion, Book II, Chapter XII, Sec. 2-3.