[It is] essentially wholesome and necessary, for a Christian to know, whether or not the will does any thing in those things which pertain unto Salvation. Nay, let me tell you, this is the very hinge upon which our discussion turns. It is the very heart of the subject
Martin LutherFaith cannot be inherited or gained by being baptized into a Church. Faith is a matter between the individual and God.
Martin LutherNo man ought to lay a cross upon himself, or to adopt tribulation, as is done in popedom; but if a cross or tribulation come upon him, then let him suffer it patiently, and know that it is good and profitable for him.
Martin LutherBut what will happen even if we do burn down the Jews synagogues and forbid them publicly to praise God, to pray, to teach, to utter God's name? They will still keep doing it in secret. If we know that they are doing this in secret, it is the same as if they were doing it publicly. for our knowledge of their secret doings and our toleration of them implies that they are not secret after all and thus our conscience is encumbered with it before God.
Martin LutherWhenever the devil harasses you, seek the company of men or drink more, or joke and talk nonsense, or do some other merry thing. Sometimes we must drink more, sport, recreate ourselves, and even sin a little to spite the devil, so that we leave him no place for troubling our consciences with trifles. We are conquered if we try too conscientiously not to sin at all. So when the devil says to you: do not drink, answer him: I will drink, and right freely, just because you tell me not to.
Martin Luther