Righteousness from the Law means that Christ died in vain!
Galatians 2:11-21 (KJV)
11 But when Peter was come to Antioch, I withstood him to the face, because he was to be blamed.
12 For before that certain came from James, he did eat with the Gentiles: but when they were come, he withdrew and separated himself, fearing them which were of the circumcision.
13 And the other Jews dissembled likewise with him; insomuch that Barnabas also was carried away with their dissimulation.
14 But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?
15 We who are Jews by nature, and not sinners of the Gentiles,
16 Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.
17 But if, while we seek to be justified by Christ, we ourselves also are found sinners, is therefore Christ the minister of sin? God forbid.
18 For if I build again the things which I destroyed, I make myself a transgressor.
19 For I through the law am dead to the law, that I might live unto God.
20 I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me.
21 I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
Galatians 2:11-21 (ESV)
11 But when Cephas came to Antioch, I opposed him to his face, because he stood condemned.
12 For before certain men came from James, he was eating with the Gentiles; but when they came he drew back and separated himself, fearing the circumcision party.
13 And the rest of the Jews acted hypocritically along with him, so that even Barnabas was led astray by their hypocrisy.
14 But when I saw that their conduct was not in step with the truth of the gospel, I said to Cephas before them all, “If you, though a Jew, live like a Gentile and not like a Jew, how can you force the Gentiles to live like Jews?”
15 We ourselves are Jews by birth and not Gentile sinners;
16 yet we know that a person is not justified by works of the law but through faith in Jesus Christ, so we also have believed in Christ Jesus, in order to be justified by faith in Christ and not by works of the law, because by works of the law no one will be justified.
17 But if, in our endeavor to be justified in Christ, we too were found to be sinners, is Christ then a servant of sin? Certainly not!
18 For if I rebuild what I tore down, I prove myself to be a transgressor.
19 For through the law I died to the law, so that I might live to God.
20 I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me.
21 I do not nullify the grace of God, for if righteousness were through the law, then Christ died for no purpose.
Salvation by the works of the law must be felt to be impossible by every man who would be saved. We must learn that salvation is of grace through faith in Jesus Christ our Lord, and not by our own doings or feelings; but this is a doctrine no one will receive till he has learned the previous truth, that salvation by the works of the law can never come to any man of woman born. Yet the law must be fulfilled. Many will say with Nicodemus “How can these things be?” I answer, the law is fulfilled in Christ, and by faith we receive the fruit thereof.