How do we know that God's justice is revealed in the Gospel?

Romans 1:17 states that 'the justice of God is revealed by faith and for faith'. This passage underscores that the Gospel is the divine mechanism by which sinners are granted justification—meaning they are declared righteous before God. It is through faith in Jesus Christ that believers receive God's righteousness, which is essential to salvation. The concept of justification reveals that God's justice does not compromise His mercy, highlighting the balance of His character as both just and loving.