Ecclesiastes 9:18 Wisdom is better than weapons of war: but one sinner destroyeth much good.
[Patriarchs & Prophets pp 42] 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.
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. He that rules in the heavens is the one who sees the end from the beginning—the one before whom the mysteries of the past and the future are alike outspread, and who, beyond the woe and darkness and ruin that sin has wrought, beholds the accomplishment of His own purposes of love and blessing.
Isaiah 46:9 Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me, 10 Declaring the end from the beginning, and from ancient times the things that are not yet done, saying, My counsel shall stand, and I will do all my pleasure.
May God add His blessing to the study of His word. “Good night” and God bless!