How do we know our righteousness comes from God?

The righteousness that comes from God is clearly articulated in Philippians 3:9, which distinguishes it from our 'own righteousness.' This understanding is rooted in the doctrine of imputed righteousness, where Christ's perfect obedience and sacrificial atonement are credited to believers through faith. This theological tenet underscores that no human effort can achieve righteousness in God's sight; rather, it is exclusively a work of divine grace, a core principle in historic Reformed theology.