How do we know that justification is obtained through Christ?

The doctrine of justification is firmly rooted in the reality that Christ's blood has already atoned for sin. As the writer of Hebrews affirms, we are justified not by our works but through faith in Christ who bore our sins and died in our place. The law only exposes our guilt, while Christ’s sacrifice offers the assurance of righteousness before God, confirming that those who are in Him are justified and eternally secure. This underscores the importance of understanding that our acceptance before God relies wholly on Christ's merit, rather than our own.