How do we know God is just and can save?

God's holiness and justice are foundational attributes that show He cannot accept sin. As articulated in Micah 7:18, God delights in mercy, but His mercy is exercised without compromising His justice. Jesus, as our perfect sacrifice, fulfilled both justice and mercy, allowing God to justify sinful men without injustice. The sermon emphasizes that if God is truly just, then He demands perfection, which is met in Christ's atoning work. Therefore, through faith in Christ, we are justified and saved (Romans 3:26).