It was a costly triumph. But God’s values are not so easily reckoned. If God had simply terminated Satan, then it would not have been so clear that God is both stronger and infinitely more to be desired than Satan. God wills for his glory to shine forth not only through acts of physical power, but also through acts of moral and spiritual power that display the beauty of his grace with lavish colors. To take sinners out of Satan’s hands by virtue of Christ’s sin-bearing sacrifice and his law-fulfilling obedience to the Father was a more glorious victory than mere annihilation of the enemy.
Within the church, it is possible for believers to possess a profound unity based on a shared commitment to Biblical truth, an intimate knowledge of the Lord Jesus Christ, and a deep level of spiritual maturity. Paul also adds "sound doctrine" and "growing in Christlikeness" as additional benefits that result from the saints being properly equipped to build up the body of Christ."(Comments on Ephesians 4 vs 11-13)