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Faith alone, Scripture alone (Reformation principles)
Luther's writings of 1520· Teaching or doctrine· Church, doctrine & the world
Faith & scriptureHeld by believers on faith and scripture; history can neither confirm nor rule it out.
The Reformation's core claims: people are made right with God by faith in Christ alone, and scripture alone is the final authority.
See it on the Bible & Christianity map →What it is
Later summed up as the 'solas': sola fide (faith alone), sola gratia (grace alone), sola scriptura (scripture alone). Luther argued that God declares sinners righteous because of Christ, a gift received by trust, not earned by good works or church rites (Romans 3:28; Galatians 2:16). He set it out in The Freedom of a Christian (1520). Good works follow faith as fruit, not payment. The Catholic Council of Trent (1547) replied that grace-enabled works also play a part in justification.
Why it matters
It became the main theological dividing line between Protestants and Catholics. In 1999 Lutherans and Catholics signed a Joint Declaration saying they now agree on its basics.
Faith and history
Luther's 1520 treatises and his 1522 preface to Romans set it out. Whether it is true is a matter of faith; historians can trace only how the idea developed.
Questions and debates
Scholars of the 'New Perspective on Paul' (E. P. Sanders, N. T. Wright) argue Paul's concern was Jews and Gentiles belonging together, not individual guilt as Luther read it.
Connections (4)
▸Grace: salvation as God's free gift was restated by the Reformers as Faith alone, Scripture alone (Reformation principles)Historical record
The connection
Paul taught that salvation is God's free gift, received 'by grace through faith' (Ephesians 2:8–9). The Reformers sharpened this into 'grace alone, faith alone': God declares sinners righteous for Christ's sake, apart from any merit. Catholics also teach salvation by grace, but reject that faith alone justifies.
When and where
Wittenberg, 1517–1520, especially Luther's 1520 treatises; Calvin's Institutes (1536) gave it systematic form.
Historical evidence
The Reformers quote Paul directly and cite Augustine; the lineage is explicit in their own writings.
Questions and debates
Whether the Reformers' 'declared righteous' reading is what Paul meant, or a new emphasis, is still debated among Protestant and Catholic scholars.
▸Martin Luther proclaimed Faith alone, Scripture alone (Reformation principles)Historical record
The connection
Luther taught that sinners are justified, declared right with God, by trusting Christ, not by works or merits. He spelled it out in his 1520 treatises, rendered Romans 3:28 as 'by faith alone', and in the Smalcald Articles (1537) called it the article on which everything stands.
When and where
Wittenberg: The Freedom of a Christian, 1520; German New Testament, 1522; Augsburg Confession, article 4, 1530.
Historical evidence
Luther's writings state it repeatedly; the Augsburg Confession (1530) made it official Lutheran teaching.
Questions and debates
Whether adding 'alone' was faithful to Paul, and whether Paul's 'works of the law' meant good deeds or Jewish markers like circumcision, remains debated.
▸Council of Trent and the Catholic Reformation rejected Faith alone, Scripture alone (Reformation principles)Historical record
The connection
Luther taught that sinners are justified, made right with God, by faith alone, with Scripture alone as final authority. Trent's decree on justification (1547) taught that God's grace begins justification but that believers cooperate and grow in it through faith, hope, love and good works; its fourth session (1546) placed Scripture and church Tradition together.
When and where
Trent, sixth session, January 13, 1547, after seven months of debate; the decree has 16 chapters and 33 canons.
Historical evidence
The decree survives, including canon 9 condemning 'faith alone' as the council understood Protestants to teach it, alongside the Luther writings it answers.
Questions and debates
In 1999 Catholics and Lutherans signed a Joint Declaration saying their teachings on justification no longer warrant mutual condemnation; how deep that agreement goes is still debated.
▸Ecumenism and the World Council of Churches led to a 1999 Lutheran–Catholic accord on Faith alone, Scripture alone (Reformation principles)Historical record
The connection
How sinners are made right with God, the question that split Luther from Rome, became the focus of decades of dialogue. The 1999 Joint Declaration affirmed that 'by grace alone, in faith in Christ's saving work and not because of any merit on our part, we are accepted by God,' and said the 16th-century condemnations do not apply to it.
When and where
Signed in Augsburg, Germany, on Reformation Day, October 31, 1999, by the Lutheran World Federation and the Vatican; Methodists (2006), Reformed (2017) and Anglicans later joined.
Historical evidence
The signed declaration and its official annex are published by both churches.
Questions and debates
More than 150 German Protestant theologians protested that it blurred real differences, and disputes remain over the church, the sacraments and papal authority.