How does God demonstrate His justice and mercy in the gospel?

God's nature embodies both justice and mercy, which beautifully converge at the cross. Scripture teaches that God cannot overlook sin without punishment (Exodus 34:7). However, through Christ's substitutionary atonement, God's justice is fully executed as sin is punished in Him. Thus, God's holiness and righteousness demand that sin must be addressed, and in Christ’s death, it was: 'God made Him to be sin for us.' Simultaneously, this act allows God to extend mercy, providing a way for sinners to be declared righteous in Christ. Therefore, God's justice and mercy are not in opposition but work harmoniously to accomplish our salvation, illustrating His profound love and grace.