The two parts of God’s divine love are justice and mercy (Psalms 89:14)
What is justice?
Giving exactly what is deserved or not using false balances or regarding the person of man. It is fairness in the face of unfair circumstances.
When Adam sinned, the whole world was condemned in him. the Just reward or wages was death (Romans 5:12, 6:23).
Satan the accuser of the brethren (Revelation 12:10) stood ready to insinuate that God should destroy man whom He had created because that would be just and prove his claim that God is a “hard man” (Matthew 25:24).
But God Demonstrated what had not been known in the universe.