Why is the concept of Christ's righteousness important?

The importance of Christ's righteousness lies in the fact that believers are not justified by their own law-keeping but through faith in Christ (Philippians 3:9). The Apostle Paul emphasizes that personal righteousness, which is rooted in the law, cannot save; rather, it is Christ's righteousness that is imputed to believers through faith. This righteousness brings assurance and peace, freeing them from the burden of attempting to earn their salvation. Therefore, understanding Christ's righteousness is foundational to a believer's identity and security in Christ.