Man is Righteous and a Sinner at the Same Time

[GHansen]

"Let Christians strive to learn completely and perfectly this doctrine of Christian righteousness, which the sophists neither understand nor are able to understand. But let them not suppose that they can learn it thoroughly all at once. Therefore let them make the effort to read Paul often and with the greatest diligence. Let them compare the first with the last; in fact, let them compare Paul as a whole with himself. Then they will find that this is the situation, that Christian righteousness consists in two things: first, in faith, which attributes glory to God; secondly, in God’s imputation. For because faith is weak, as I have said, therefore God’s imputation has to be added. That is, God does not want to impute the remnant of sin and does not want to punish it or damn us for it. But He wants to cover it and to forgive it, as though it were nothing, not for our sakes or for the sake of our worthiness or works but for the sake of Christ Himself, in whom we believe.

"Thus a Christian man is righteous and a sinner at the same time [simul justus et peccator], holy and profane, an enemy of God and a child of God. None of the sophists will admit this paradox, because they do not understand the true meaning of justification. This was why they forced men to go on doing good works until they would not feel any sin at all. By this means they drove to the point of insanity many men who tried with all their might to become completely righteous in a formal sense but could not accomplish it. And innumerable persons even among the authors of this wicked dogma were driven into despair at the hour of death, which is what would have happened to me if Christ had not looked at me in mercy and liberated me from this error.

"We, on the other hand, teach and comfort an afflicted sinner this way: “Brother, it is impossible for you to become so righteous in this life that your body is as clear and spotless as the sun. You still have spots and wrinkles (Eph. 5:27), and yet you are holy.” But you say: “How can I be holy when I have sin and am aware of it?” “That you feel and acknowledge sin—this is good. Thank God, and do not despair. It is one step toward health when a sick man admits and confesses his disease.” “But how will I be liberated from sin?” “Run to Christ, the Physician, who heals the contrite of heart and saves sinners. Believe in Him. If you believe, you are righteous, because you attribute to God the glory of being almighty, merciful, truthful, etc. You justify and praise God. In short, you attribute divinity and everything to Him. And the sin that still remains in you is not imputed but is forgiven for the sake of Christ, in whom you believe and who is perfectly righteous in a formal sense. His righteousness is yours; your sin is His.”

Luther, M. (1999). Luther’s works, vol. 26: Lectures on Galatians, 1535, Chapters 1-4. (J. J. Pelikan, H. C. Oswald, & H. T. Lehmann, Eds.) (Vol. 26, pp. 232–233). Saint Louis: Concordia Publishing House.