The offering of [the body] is called a spiritual sacrifice because it is freely sacrificed through the Spirit, the Christian being uninfluenced by the constrainst of the Low or the fear of hell.
Martin LutherAs long as a man is persuaded that he can make even the smallest contribution to his salvation, he remains self-confident and does not utterly despair of himself, and so is not humbled before God. Such a man plans out for himself a position, an occasion, a work, which shall bring him final salvation, but which will not.
Martin LutherHow is God's name hallowed among us? When both our doctrine and living are truly Christian.
Martin LutherLet us not flutter too high, but remain by the manger and the swaddling clothes of Christ, 'in whom dwelleth all the fullness of the Godhead bodily.'
Martin LutherIn short, I will preach it [the Word], teach it, write it, but I will constrain no man by force, for faith must come freely without compulsion. Take myself as an example. I opposed indulgences and all the papists, but never with force. I simply taught, preached, and wrote God's Word; otherwise I did nothing. And while I slept, or drank Wittenberg beer with my friends Philip and Amsdorf, the Word so greatly weakened the papacy that no prince or emperor ever inflicted such losses upon it. I did nothing; the Word did everything.
Martin Luther