How does the incident with Uzzah demonstrate the exceeding sinfulness of sin?

The incident with Uzzah vividly illustrates the exceeding sinfulness of sin by showcasing the fatal consequences of attempting to approach God through the law while disregarding His commands. Uzzah, despite his good intentions, touched the Ark, which was strictly forbidden in the law, demonstrating that even sincere efforts under the law are insufficient and can lead to death. As Paul writes in Romans 7:11, sin deceives us, leading us to believe we can perform acceptable acts under the law when, in truth, the law reveals our sinfulness. This serves as a reminder that without reliance on the grace provided in Christ, any attempts to gain righteousness through the law are ultimately futile and dangerous.