The Protestant Reformation: What Happened and Why

Catholic teaching

The Church acknowledges that real abuses, especially the scandalous sale of indulgences and clerical corruption in the early 16th century, gave legitimate grounds for reform, and that figures within the Church were already calling for correction before Luther. The Church's judgment, however, is that Martin Luther's break in 1517-1521 moved from criticizing abuses to rejecting doctrines the Church holds as revealed and irreformable—the necessity of the sacraments, the authority of Sacred Tradition alongside Scripture, and the role of good works informed by grace in justification. The Council of Trent (1545-1563) responded both by definitively clarifying Catholic doctrine on justification, Scripture and Tradition, and the sacraments, and by enacting the very reforms of clerical discipline and formation the times required, showing the Church could reform herself without abandoning doctrine.

Biblical foundation

James explicitly teaches that a person is justified by works and not by faith alone, using the very phrase 'faith alone' to reject the formula Luther made central, a text Luther famously struggled to reconcile with his own theology, at one point calling James 'an epistle of straw.' Paul instructs the Thessalonians to hold fast to traditions taught either by word of mouth or by letter, showing that oral apostolic tradition carried authority alongside written Scripture from the beginning, undermining sola scriptura as a first-century apostolic principle. Christ's prayer that his followers 'may all be one' stands as a rebuke to any division of the visible Church, whatever the immediate cause.

Scripture references

Historical evidence

Martin Luther posted his Ninety-Five Theses in Wittenberg in 1517, initially as an academic challenge to the preaching of indulgences by Johann Tetzel, a document that historians agree began as a call for internal debate, not a declaration of schism. Within a few years, however, Luther's 1520 treatises (To the Christian Nobility, The Babylonian Captivity of the Church) rejected the papacy's authority, five of the seven sacraments, and the sacrificial nature of the Mass, moving well past the original grievance. The Council of Trent's decrees, still authoritative Catholic teaching today, simultaneously condemned the new doctrines and mandated seminaries, resident bishops, and preaching reforms that addressed the genuine corruption Luther had first protested, demonstrating the Counter-Reformation was both doctrinal and disciplinary.

The Church Fathers

Catechism