What does the Bible say about the nature of sin and its consequences?

The scriptural foundation for understanding sin and its consequences is found in Romans 5:12, which states that 'by one man sin entered the world, and death by sin.' This passage reveals that Adam's transgression brought sin into humanity, leading to universal condemnation and death. The fiery serpents in Numbers 21 serve as an emblem of sin's deadly nature and the judgment it incurs. The consequences of sin are grave, for Romans 6:23 affirms that the wages of sin is death. Yet, the overarching narrative of Scripture also highlights God's redemptive plan through Christ, who bore the penalty for the sins of His people, thus offering the hope of eternal life to those who believe.