In this verse, Paul explains that Christ represents the fulfillment or completion of the law. This means that through His life, death, and resurrection, Jesus accomplished what the law intended but could not achieve on its own—providing a way for people to be made right with God. The law, with its commandments and regulations, pointed towards a need for a savior, and Christ is that savior.
For believers, this means that righteousness, or being in right standing with God, is accessible through faith in Jesus Christ, rather than through strict adherence to the law. This was a radical shift from the traditional Jewish understanding, which emphasized following the law as the path to righteousness. Paul is emphasizing that faith in Christ transcends the law, making salvation available to all who believe, regardless of their adherence to the law. This underscores the universal and inclusive nature of the Christian message, where faith, rather than works, is the key to righteousness and salvation.