How do we know God judges sin?

The judgment of God is an essential reality taught throughout Scripture, demonstrating His holiness and justice. In Jeremiah 9, God warns of coming destruction for those who forsake His laws. Furthermore, Isaiah 53 expresses how God inflicted judgment upon His Son as a means to bring salvation to His elect. This duality of God exercising justice while simultaneously offering grace underscores His righteous character and reminds believers of the seriousness of sin. God's judgment is not arbitrary; it fulfills His perfect nature and ensures the establishment of truth and righteousness.