Why can't we be justified by keeping the law?

The law serves to expose our sinfulness and demonstrate that we are incapable of achieving righteousness on our own. Romans 4:15 states, 'Because the law brings about wrath; for where there is no law, there is no transgression.' Thus, relying on law-keeping for justification ultimately leads to condemnation. Rather, true justification comes through faith in Christ, who fulfilled the law and paid the penalty for our sins. This underscores the necessity of grace and faith for salvation, rather than any attempts at self-righteousness.