Acts 13

To the people of Antioch, Paul preached of the Savior -

"...that through this man is preached unto you the forgiveness of sins:
39 And by him all that believe are justified from all things, from which ye could not be justified by the law of Moses."  (Acts 13:38–39)

Years before ,Lehi taught the same thing -

"...by the law no flesh is justified..."  (2 Nephi 2:5)

Obviously, we cannot be justified by the law of Moses.  It is through the power of the atonement of Jesus Chris can we be justified.