How can Christians reconcile God's justice with His mercy?

God's justice and mercy coexist in harmony through the gospel. While the law demands punishment for sin, God's mercy allows for forgiveness through the substitution of Christ. When Christ died on the cross, He bore the punishment that sinners deserve, satisfying the demands of justice. Consequently, believers are granted mercy and can be justified before God. This duality is not a contradiction; rather, it showcases the magnificence of God's character—He is both just and the justifier of those who have faith in Jesus.