How does Christ’s righteousness relate to our salvation?

In Reformed theology, the imputation of Christ's righteousness is a fundamental aspect of salvation. As seen in Philippians 3:9, the apostle Paul expresses his desire to be found in Christ, not having his own righteousness which is derived from the Law, but that which is through faith in Christ. This indicates that upon believing, a Christian receives Christ's perfect righteousness as a gift. This imputed righteousness is essential because it satisfies the demands of God's law and justifies the believer before Him. Without this alien righteousness, no one could stand before a holy God, reinforcing the necessity of grace in the act of salvation.