Martin Luther on the battle we all face daily.
Although I feel my sin and cannot have as confident and cheerful a heart as I should like, still I must permit the Word to have sway and say accordingly: “I am lord over sin, and I don’t want to know of any sin.” “Indeed,” you will say, “let your own conscience say that; it feels and experiences something far different.” That is surely true; if things followed the rule of feeling, I would surely be lost. But the Word must be valid over and beyond all of the world’s feeling and mine. It must remain true no matter how insignificant it may appear and how feebly it may be believed by me; for we all see and experience the fact that sin condemns us straightway and consigns us to hell, that death consumes us and all the world, and that no one can escape it. And you venture to speak to me of life and of righteousness, of which I cannot behold as much as a small spark! To be sure, that must be but a feeble life. Yes, indeed, but a feeble life by reason of our faith. But no matter how feeble it is, as long as the Word and a small spark of faith remain in the heart, it shall develop into a fire of life which fills heaven and earth and quenches both death and every other misfortune like a little drop of water. And the feeble faith shall tear these asunder so that neither death nor sin will be seen or felt any longer. However, to adhere to faith in the face of seeing and feeling calls for an arduous battle.
Martin Luther, Luther’s Works, Vol. 28: 1 Corinthians 7, 1 Corinthians 15, Lectures on 1 Timothy, ed. Jaroslav Jan Pelikan, Hilton C. Oswald and Helmut T. Lehmann, 1 Co 15:1–2 (Saint Louis: Concordia Publishing House, 1999).