"Thus in ourselves we are sinners, and yet, through God's reckoning, we are righteous by faith. … Is he then perfectly righteous? No; he is at the same time a sinner and righteous: a sinner in fact, but righteous by God's reckoning and sure promise that He will free him from sin until He has healed him completely."
— Martin Luther
Source: Lectures on Romans (1515–16), scholion on Rom. 4:7 (translated from the Latin)