VERSE 6. For we through the Spirit wait for the hope of righteousness by faith.
Paul concludes the whole matter with the above statement. "You want to be justified by the Law, by circumcision, and by works. We cannot see it. To be justified by such means would make Christ of no value to us. We would be obliged to perform the whole law. We rather through the Spirit wait for the hope of righteousness." The Apostle is not satisfied to say "justified by faith." He adds hope to faith.
Holy Writ speaks of hope in two ways: as the object of the emotion, and hope as the emotion itself. In the first chapter of the Epistle to the Colossians we have an instance of its first use: "For the hope which is laid up for you in heaven," i.e., the thing hoped for. In the sense of emotion we quote the passage from the eighth chapter of the Epistle to the Romans: "For we are saved by hope." As Paul uses the term "hope" here in writing to the Galatians, we may take it in either of its two meanings. We may understand Paul to say, "We wait in spirit, through faith, for the righteousness that we hope for, which in due time will be revealed to us." Or we may understand Paul to say: "We wait in Spirit, by faith for righteousness with great hope and desire." True, we are righteous, but our righteousness is not yet revealed; as long as we live here sin stays with us, not to forget the law in our members striving against the law of our mind. When sin rages in our body and we through the Spirit wrestle against it, then we have cause for hope. We are not yet perfectly righteous. Perfect righteousness is still to be attained. Hence we hope for it.
This is sweet comfort for us. And we are to make use of it in comforting the afflicted. We are to say to them: "Brother, you would like to feel God's favor as you feel your sin. But you are asking too much. Your righteousness rests on something much better than feelings. Wait and hope until it will be revealed to you in the Lord's own time. Don't go by your feelings, but go by the doctrine of faith, which pledges Christ to you."
This passage contains excellent doctrine and much comfort. It declares that we are justified not by works, sacrifices, or ceremonies, but by Christ alone. The world may judge certain things to be ever so good; without Christ they are all wrong. Circumcision and the law and good works are carnal. "We," says Paul, "are above such things. We possess Christ by faith and in the midst of our afflictions we hopefully wait for the consummation of our righteousness." You may say, "The trouble is I don't feel as if I am righteous." You must not feel, but believe. Unless you believe that you are righteous, you do Christ a great wrong, for He has cleansed you by the washing of regeneration, He died for you so that through Him you may obtain righteousness and everlasting life.
Luther, Martin. Commentary on the Epistle to the Galatians (p. 146). Kindle Edition.