The Work
Von der Freiheit eines Christenmenschen (German edition) and De Libertate Christiana (Latin edition) were published in November 1520 - the same year as Luther's Address to the Christian Nobility and The Babylonian Captivity of the Church, making 1520 the most productive and dramatic year of his public career. Together the three 1520 treatises constitute Luther's Reformation manifesto: the first addresses the political and institutional church; the second addresses the sacramental system; and The Freedom of a Christian addresses the theological heart of the matter - the relationship between faith, grace, law, and love.
The treatise was written with pastoral intent. Luther dedicated it to Pope Leo X with a preface that is simultaneously conciliatory in tone and uncompromising in substance - a last attempt at communication before the break became irreparable. The German edition, which was written first and is more forceful, was addressed to the German laity; the Latin edition was addressed to the international scholarly audience. The two versions together made Luther's theology of freedom simultaneously accessible to German artisans and comprehensible to European humanists.
Biblical Engagement
Romans 1:17 ('For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith') is Luther's discovery text - the verse whose meaning he had struggled with and which, once understood, unlocked his entire theology. He describes in his autobiographical preface (1545) how the phrase 'righteousness of God' had terrified him as a demand he could not meet, until he came to understand it as a gift - the righteousness that God gives to the believer through faith in Christ. This verse is the foundation of the entire treatise.
Galatians 5:1 ('Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage') provides the structural title concept: the freedom of a Christian is not freedom from obligation but freedom from the law as the basis of one's standing before God. The Christian is free from the law as a system of works-righteousness while remaining bound to the law as an expression of love for neighbor.
Song of Solomon 2:16 ('My beloved is mine, and I am his') is deployed by Luther through the patristic tradition of the mystical marriage to describe the union between Christ and the soul. In this marriage, Luther argues, there is a 'happy exchange' (fröhlicher Wechsel): the soul brings its sin, death, and condemnation; Christ brings his righteousness, life, and salvation; and these are exchanged in the nuptial union. This image of the 'wonderful exchange' or 'joyful exchange' is Luther's most lyrical theological contribution and has profoundly shaped Protestant soteriology.
Galatians 2:20 ('I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me') provides the christological grammar of the Christian life after justification. The believer no longer lives by moral effort but by faith - that is, by receptive trust in the living Christ who indwells the soul. This verse is the key text for Luther's theology of union with Christ as the foundation of the Christian life.
Author and Context
Luther wrote this treatise while under the Imperial ban following the Diet of Worms - literally a condemned man. The courage required to continue publishing in these circumstances was considerable. The treatise was written in the weeks immediately following the burning of the papal bull Exsurge Domine (which threatened Luther with excommunication) and before the formal bull of excommunication Decet Romanum Pontificem (January 1521). Luther was simultaneously defiant and conciliatory, attempting to maintain communication with Rome while making clear that on the central question of justification by faith there could be no compromise.
Themes
The treatise's two governing 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' - are a paradox that Luther unpacks with care. The first thesis describes the Christian's standing before God: justified by faith alone, free from the law as a basis of merit, free from the condemnation of sin, free from the authority of any religious institution to determine one's salvation. The second describes the Christian's posture toward neighbor: because the Christian has received freely, the Christian gives freely; because the Christian needs nothing for his own salvation, the Christian is free to devote everything to the service of others.
This paradox of freedom-in-service is Luther's answer to the antinomian implication of justification by faith: if we are saved by faith alone and not by works, why do anything? Luther's answer is that the Christian does not obey from fear of punishment or hope of reward but from love - the overflowing gratitude of a person who has received freely and therefore gives freely. Works are not the ground of salvation but its fruit.
Reception
The treatise was immediately popular in Germany and across Europe. Its combination of pastoral warmth with theological precision made it the most readable account of Lutheran soteriology available to lay readers. It was translated into numerous languages within years of publication.
Legacy
The treatise's concept of the 'happy exchange' became one of the most generative ideas in Protestant theology, influencing Calvin's doctrine of union with Christ, the Pietist tradition of the heart's union with the Savior, and contemporary Evangelical understandings of imputation. The paradox of freedom and service has been taken up by liberation theologians (who emphasize the service side) and by Lutheran confessional theologians (who emphasize the freedom side). Its influence on modern Christian ethics - particularly the distinction between motivation by law and motivation by grace - is pervasive.