God could employ only such means as were consistent with truth and righteousness. Satan could use what God could not—flattery and deceit. He had sought to falsify the word of God and had misrepresented His plan of government, claiming that God was not just in imposing laws upon the angels; that in requiring submission and obedience from His creatures, He was seeking merely the exaltation of Himself. It was therefore necessary to demonstrate before the inhabitants of heaven, and of all the worlds, that God’s government is just, His law perfect. Satan had made it appear that he himself was seeking to promote the good of the universe. The true character of the usurper and his real object must be understood by all. He must have time to manifest himself by his wicked works. (PP 42.1) MC VC

The discord which his own course had caused in heaven, Satan charged upon the government of God. All evil he declared to be the result of the divine administration. He claimed that it was his own object to improve upon the statutes of Jehovah. Therefore God permitted him to demonstrate the nature of his claims, to show the working out of his proposed changes in the divine law. His own work must condemn him. Satan had claimed from the first that he was not in rebellion. The whole universe must see the deceiver unmasked. (PP 42.2) MC VC

Even when he was cast out of heaven, Infinite Wisdom did not destroy Satan. Since only the service of love can be acceptable to God, the allegiance of His creatures must rest upon a conviction of His justice and benevolence. The inhabitants of heaven and of the worlds, being unprepared to comprehend the nature or consequences of sin, could not then have seen the justice of God in the destruction of Satan. Had he been immediately blotted out of existence, some would have served God from fear rather than from love. The influence of the deceiver would not have been fully destroyed, nor would the spirit of rebellion have been utterly eradicated. For the good of the entire universe through ceaseless ages, he must more fully develop his principles, that his charges against the divine government might be seen in their true light by all created beings, and that the justice and mercy of God and the immutability of His law might be forever placed beyond all question. (PP 42.3) MC VC

Satan’s rebellion was to be a lesson to the universe through all coming ages—a perpetual testimony to the nature of sin and its terrible results. The working out of Satan’s rule, its effects upon both men and angels, would show what must be the fruit of setting aside the divine authority. It would testify that with the existence of God’s government is bound up the well-being of all the creatures He has made. Thus the history of this terrible experiment of rebellion was to be a perpetual safeguard to all holy beings, to prevent them from being deceived as to the nature of transgression, to save them from committing sin, and suffering its penalty. (PP 42.4) MC VC