What role does faith play in being part of the 'us' who fulfills all righteousness?

Believers are part of the 'us' who fulfill all righteousness through their faith in Christ. Galatians 2:20 expresses that believers are crucified with Christ and now live by faith in Him. This faith is the means by which they are united to Christ, enabling them to share in His righteousness. Through faith, they are not only justified but also empowered to live out their identity as those who have fulfilled all righteousness in Him. Therefore, it is not their works but their faith in Christ that establishes their standing as included in this significant 'us'.