It was not enough that the Son of God should come down from the heavens and appear as the Son of Man, for then He would have been only a great teacher and a great example, but not a Redeemer. It was more important for Him to fulfill the purpose of the coming, to redeem man from sin while in the likeness of human flesh. Teachers change men by their lives; Our Blessed Lord would change men by His death. The poison of hate, sensuality, and envy which is in the hearts of men could not be healed simply by wise exhortations and social reforms. The wages of sin is death, and therefore it was to be by death that sin would be atoned for.
Fulton J. Sheen, Life of Christ
jesus, redemption, salvation, sin, the-cross