Genesis 1:4 And God saw the light, that it was good: and God divided the light from the darkness.
Not all anger is wrong or bad. There is righteous anger; the just anger against those who have committed wicked and evils acts. Similarly, not all division is wrong or bad. Indeed, the Gospel of Jesus Christ divides, and has done from the very days of Creation.
Through the days of Creation, we see division as part of what God each time calls “good”. Light is divided from dark (verse 4), waters from waters (verse 6), dry land from seas (verses 9-10), sun & daytime from moon/stars & nighttime (verse 14). These divisions underscore the very message of the Gospel, that God divides and that this is good.
The Lord will divide the repentant from the unrepentant, the saved from the lost, the sheep from the goats. He will divide those who will dwell with Him in glory forever, from those who will dwell in hell forever.
This is good and just because how could a perfect heavens and earth remain good and perfect if evil, unrepentant people were still allowed to dwell there? Perfection would be tainted and therefore no longer be perfect. Furthermore, how could it be good that people who want to away from God, are then forced to live with Him forever?!
This truth is very close to the heart of God. So much so that we see a picture of the Gospel in this revealing verse. For darkness is divided from light, a light that comes directly from God Himself (the sun and stars have not been made yet). In this, we are seeing a symbol of how God can have no union with darkness. Therefore, all those who follow Christ Jesus, the Light of the world, will dwell in that light forever. Whereas those who choose to shun that light that is Christ, will place themselves in darkness forever. It is a choice.
Praise the Lord forevermore, that in His eternal grace and mercy, He has revealed this truth to all the generations of mankind. Every last person in Heaven, from Adam to the final soul called to salvation, is there by the same method that is repentance of sin and faith in Jesus Christ. By that Gospel truth, we are called from the lost to be found in Jesus, and thereby dwell in His light forever. Amen.