Therefore, my dear brother, learn Christ and him crucified, learn to pray to him, despairing of yourself saying: "You, Lord Jesus, are my righteousness, but I am your sin; you have taken on yourself what you were not, and have given to me what I was not." Beware of ever aspiring to such purity that you do not want to seem to yourself, or to be, a sinner. For Christ dwells only in sinners.
It was for this that he came down from heaven, where he dwelled in the righteous, that he might also dwell in sinners. Think about his love and you will see how beautifully it will comfort and sustain you. For if it is only our own efforts and strivings that can achieve a quiet conscience, what did he die for? You will therefore find peace only in him, in faith despairing in yourself and your own works; and thus you will learn that as he took you up and made your sins his own, he made his righteousness yours. LETTER TO GEORGE SPENLEIN (April 8, 1516)" pg. 54 'Romans 1-8' New Testament VII Reformation Commentary On Scripture