What does it mean that God punishes sin?

The necessity of punishing sin is rooted in God's nature as holy and just. Scripture teaches that sin cannot simply be overlooked; it requires judgment. God demonstrated His righteous character through the cross, where Christ bore the penalty for sin on behalf of believers (Romans 5:8). This punishment of Christ reveals both God's justice—satisfying the requirements of His law—and His mercy, as it allows for the possibility of salvation for those who trust in Him. Therefore, the cross serves as evidence of God’s commitment to justice while also illustrating His profound love for sinners.