Martin Luther's treatise "Concerning Christian Liberty" is one of the most powerful and concise presentations of the Christian life ever written. The power, discernment, brevity and readability of this work make a true gem among Reformation writings (and Christian writings in general). Here you will find the essence of the spirit of the Reformation distilled into a guide for practical, biblical living. With the clarity and bold authority of a true prophet, Luther sets forth the whole of the Christian life in two theses: "A Christian is a perfectly free lord of all, subject to none. A Christian is a perfectly dutiful servant of all, subject to all." We are free from sin and the law (subject to none) but slaves to Christ in love (subject to all). As Paul writes in Romans 6:22, "But now...you have been set free from sin and have become slaves of God." Luther writes as a shepherd of the common people and the tone and content differ greatly from his better-known debate-oriented works such as Bondage of the Will or 95 Theses. The doctrine of justification by grace alone through faith alone in Christ alone is the heart and soul of Luther's message, founded upon a firm conviction in the authority of scripture alone.