Why is living by faith in Christ important for Christians?

Galatians 2:20 highlights that Paul lives by the faith of the Son of God, emphasizing that faith is not merely a belief system but the means by which believers engage with Christ's life. This faith results in a transformative experience where the believers are spiritually alive, empowered to produce fruit unto God instead of the vain fruits of religion. Christians are called to trust in Christ, knowing He is their source of salvation, righteousness, and sanctification. Without such faith, one remains bound by the law and is unable to fulfill the purpose of their new life in Christ, as described beautifully in Ephesians 2:8-10.