That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord. Romans 5:21. AG 345.1
The plan by which alone man's salvation could be secured, involved all heaven in its infinite sacrifice. The angels could not rejoice as Christ opened before them the plan of redemption, for they saw that man's salvation must cost their loved Commander unutterable woe. In grief and wonder they listened to His words as He told them how He must descend from heaven's purity and peace, its joy and glory and immortal life, and come in contact with the degradation of earth, to endure its sorrow, shame, and death. He was to stand between the sinner and the penalty of sin; yet few would receive Him as the Son of God. He would leave His high position as the Majesty of heaven, appear upon earth and humble Himself as a man, and by His own experience become acquainted with the sorrows, and temptations which man would have to endure. All this would be necessary in order that He might be able to succor them that should be tempted. When His mission as a teacher should be ended, He must be delivered into the hands of wicked men and be subjected to every insult and torture that Satan could inspire them to inflict. He must die the cruelest of deaths, lifted up between the heavens and the earth as a guilty sinner. He must pass long hours of agony so terrible that angels could not look upon it, but would veil their faces from the sight. He must endure anguish of soul, the hiding of His Father's face, while the guilt of transgression—the weight of the sins of the whole world—should be upon Him.... AG 345.2
He bade the angelic host to be in accord with the plan that His Father had accepted, and rejoice that, through His death, fallen man could be reconciled to God. AG 345.3
Then joy, inexpressible joy, filled heaven. The glory and blessedness of a world redeemed, outmeasured even the anguish and sacrifice of the Prince of life. Through the celestial courts echoed the first strains of that song which was to ring out above the hills of Bethlehem—“Glory to God in the highest, and on earth peace, good will toward men” (Luke 2:14).5Patriarchs and Prophets, 64, 65. AG 345.4