Commentaries:
We are justified through faith in the sacrifice of Jesus Christ. He is the payment for our sins, thus freeing us from sin's penalty, and at the same time, God accounts—or imputes—Christ's righteousness to us. The righteousness that enabled Him to be the perfect sacrifice is accounted as if it is ours! This then makes it possible for us to have access into the presence of the holy God.
But this does not do away with law. It establishes it! It places the law in its rightful position in our understanding of what God is working out in our lives.
John W. Ritenbaugh
The Covenants, Grace, and Law (Part Twenty-Nine)