"A Christian man is the most free lord of all, and subject to none; a Christian man is the most dutiful servant of all, and subject to every one."
Luther basically writes this short book as an exposition of these two propositions.
Banger- very helpful and a good way to get to grips with Luther and his view of justification by faith.
Loads of it is quotable!
Helpful quotes
On the convicting power of the law: "[The Laws] were ordained, however, for the purpose of showing man to himself, that through them he may learn his own impotence for good and may despair of his own strength."
On the marriage of Christ to the church: "If we compare these possessions, we shall see how estimable is the gain. Christ is full of grace, life, and salvation; the soul is full of sin, death, and condemnation. Let faith step in, and then sin, death, and hell will belong to Christ, and grace, life, and salvation to the soul. For, if He is a husband, He must needs take to Himself that which is His wife's, and at the same time, impart to His wife that which is His. For, in giving her His own body and Himself, how can He but give her all that is His? And, in taking to Himself the body of His wife, how can He but take to Himself all that is hers?"
On how the good gospel impacts our hearts: "Who can injure such a heart, or make it afraid?"
On identity leading to works: "For nothing makes the person good but faith, nor bad but unbelief."
On legalists and those of tender conscience: "Fight vigorously against the wolves, but on behalf of the sheep, not against the sheep."