Galatians 2:16-17 knowing that a man is not justified by the works of the law but by faith in Jesus Christ, even we have believed in Christ Jesus, that we might be justified by faith in Christ and not by the works of the law; for by the works of the law no flesh shall be justified.
Paul uses a word that he was quite fond of, it is the word Justified. In fact, in the 29 times that this word is mentioned in the New Testament Paul is responsible for all 29 references. Justified simply means, just as if you never sinned. When you put your faith and trust in Jesus Christ as Savior and Lord He justified you.
In other words justification is the act of God making righteous a guilty, yet believing sinner. It is God taking your guilt and the penalty your sin, and in turn you are given the righteousness of Christ. By being placed in Christ you are guiltless and not condemned. You are then declared righteous from now on and throughout eternity.
Justification doesn't come through our efforts to try and be better than we are. Nor does it come by way of keeping rules and regulations. We could never be good enough, or do enough to be justified. Justification comes by faith in the finished work of Jesus on the Cross.
There is therefore now NO condemnation to those who are in Christ Jesus. Romans 8:1