Why is God's justice and mercy essential for salvation?

God's justice ensures that sin carries consequences, which is vital for understanding the reality of divine salvation. As stated in Romans 3:26, God must be both just and the justifier of those who have faith in Jesus. If God were to simply overlook sin without just consequence, it would compromise His righteousness. Instead, through Christ's atoning sacrifice, God maintains His holiness and justice while granting mercy to the elect, fulfilling both aspects of His nature perfectly. This duality is central to the gospel, showcasing that salvation is not attained through human efforts but solely through faith in Christ—who satisfies divine justice while offering grace and forgiveness.