How do we know the concept of imputed righteousness is true?

The doctrine of imputed righteousness is rooted in the biblical revelation that believers are justified before God based on Christ's righteousness, not their own. In Galatians, Paul highlights how the Galatians were deceived into thinking they could add to Christ's finished work through their own efforts. The essence of the Gospel is that God's perfect righteousness is credited to believers through faith. This foundational truth is supported throughout scripture, including Romans and Ephesians, showcasing that salvation is a gift from God, given freely to those who place their faith in Christ's atoning sacrifice.