How do we know Christ is all-sufficient for salvation?

Paul's assertion in Philippians 3:9 emphasizes that believers are found not having their own righteousness from works of the law, but that which is through faith in Christ. This signifies that salvation is solely rooted in the righteousness of Christ. Through His death and resurrection, Christ satisfied the demands of God's law, thus rendering our efforts at self-righteousness unnecessary. Salvation comes through faith in Him alone, confirming that Christ is indeed the all-sufficient Savior for those who believe. As such, the believer's entire standing before God rests on the merits of Christ—not on personal merit or compliance to the law.