Why is the inability of man to keep God's law significant?

The inability of man to keep God's holy law is significant because it emphasizes man's fallen state and the necessity for divine intervention. In Mark 12:29-31, Jesus outlines the greatest commandments, which reflect the totality of the law. Yet, since the fall of Adam, no one is capable of fulfilling these commandments perfectly. This underlines the importance of Jesus Christ, who came as the perfect law-keeper, fulfilling every requirement on behalf of sinners, thus making salvation possible through His righteousness.