“For this is the abundant grace of the New Testament and the surpassing mercy of the Heavenly Father that, through baptism and repentance, we begin to become godly and pure. God does not hold against us whatever sin is still to be driven out, because of the beginning that we have made in godliness and because of our steady battle against sin which we continue to expel. He chooses not to charge this sin against us, though, until we become perfectly pure, he might justly do so. For this reason, he has given us a bishop, namely Christ, who is without sin and who is to be our representative until we too become entirely pure like him [Heb. 7:26; Rom. 8:34]. Meanwhile, the righteousness of Christ must be our cover. His perfect godliness must be our shield and defense. For his sake, the sin that remains in those who believe in him, may not be charged against them, as St. Paul so masterfully describes it in Rom. 3[:24-26]” (“Defense and Explanation of All the Articles” (1521), LW 32, pg 28).