How does Paul express his confidence in Christ?

In Philippians 3:9, Paul emphasizes that he desires to be found in Christ, not having his own righteousness derived from the law, but that which is through faith in Christ. This demonstration of confidence illustrates a fundamental principle of sovereign grace theology: our righteousness is completely reliant on Christ's perfect work. This reliance leads to assurance of salvation and removes the burden of self-sufficiency. Paul’s focus on Christ as the source of righteousness reflects the core of the gospel message, which teaches that we cannot merit salvation apart from Christ's atoning work.