How do we know that justification is through God's grace?

Justification is central to the Christian faith, as it signifies being declared righteous before God. Romans 8:33 tells us that it is God who justifies, meaning that our standing before Him is not based on our own merit but on the finished work of Jesus Christ. The concept is further supported by 1 Peter 3:18, which indicates that Christ, the just one, suffered for our sins, bringing us to God. This underscores that our justification is rooted in God's grace and the righteousness of Christ, not in our works.