Those that believe are covered by Jesus death and are no longer judged on the basis of law since the law has been satisfied by the death of another on your behalf. If God Judges you by what you have done right and wrong then he would invalidate Jesus substitution death on your behalf. He would be judging based on law. Christ is the end of the law to those that believe since the law required payment and Jesus paid. Therefore the law can no longer have any legal claim on a believer since the debt has been paid in full..
International Standard Version (©2012)
For the Messiah is the culmination of the Law as far as righteousness is concerned for everyone who believes.
King James Bible (Cambridge Ed.)
For Christ is the end of the law for righteousness to every one that believeth.
Aramaic Bible in Plain English (©2010)
For The Messiah is the consummation of The Written Law for righteousness to everyone who believes.