He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things? Rom. 8:32.
God could not spare the cities of Sodom and Gomorrah when their rebellion reached a certain point. Another time that God "spared not" is found in Romans 11:21. Paul was writing to the Christians in Rome, imploring them to change their ways. He reminded them that even though they were wild branches that had been grafted into the olive tree, God had broken off the natural branches because there came a point where He could no longer spare the entire Jewish nation.
A third instance when God "spared not" because of His justice is described on 2 Peter 2:5: God "spared not the old world, but saved [only] Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world."
The fourth time that God "spared not" involves the very universe--2 Peter 4:4: "God spared not the angels that sinned." Sin went on in the very presence of God--rebellion broke out in His courts, led be a mighty angel. Although God was extremely patient, He eventually had to call a halt to the rebellion. You know the results of that war in heaven. Those angels who were cast out are still present in our world today.
Well, the justice of God looks rather grim, doesn't it? He didn't spare a city, a nation, a world, or even a universe because of sin! How can this same God ever find enough mercy to pardon one individual sinner?
There is hope for each of us because God "spared not" one more time. Romans 8:32 tells us that He "spared not his own Son, but delivered him up for us all."
If you will study the sacrifice of Jesus on the cross you will discover that this is the greatest time when God "spared not." Here is demonstrated the realization that God gave Himself. None of this idea of God pleading for His Son to go, or Jesus pleading with His irate Father to spare these people! Away with such concepts!
Instead, you can see the Father and the Son involved together in this great sacrifice. Jesus was the greatest gift that God could have given us. He spared not His own Son so that His justice could remain true and His love could equal it.