The Reformation — what actually happened and why

On 31 October 1517, an obscure professor at a minor German university posted ninety-five propositions for academic debate. He expected a scholarly argument among theologians. Within two months they were being read across Europe.

What was wrong

The medieval church had accumulated genuine and serious abuses, and Catholic reformers had been saying so for a century.

Indulgences. Originally remissions of church-imposed penance, by 1517 they were being sold as reductions of time in purgatory, including for the dead. The Dominican preacher Johann Tetzel, raising money for the rebuilding of St Peter's Basilica in Rome, was reportedly using a jingle: as soon as the coin in the coffer rings, the soul from purgatory springs.

Inaccessible Scripture. The Bible existed almost exclusively in Latin, which ordinary people could not read. Vernacular translation was in many places a capital offence.

Corruption in office. Bishoprics were bought and sold. Some popes of the period lived as Renaissance princes with armies and illegitimate children.

Salvation as transaction. In popular practice — whatever official theology said — grace had become something dispensed through a sacramental system that could be accessed by payment.

What Luther actually found

The Theses are narrower than their reputation. They do not attack the pope's authority or the sacraments. They question the theology of indulgences, and several of them defend the pope against the practices being carried out in his name.

The deeper change had already happened in Luther's study. He was tormented by the phrase "the righteousness of God" (iustitia Dei) in Romans 1:17, which he understood as the standard by which God judges — and by which he knew he failed. He later described hating the phrase.

Then the sentence opened: "the righteous shall live by faith."

I began to understand that the righteousness of God is that by which the righteous lives by a gift of God, namely by faith... Here I felt that I was altogether born again and had entered paradise itself through open gates.— Martin Luther, 1545 preface to his Latin works

The righteousness of God is not only a standard God demands. It is a righteousness God gives.

Why it spread when earlier attempts had failed

Jan Hus taught much of what Luther taught, a century earlier. He was burned at Constance in 1415, and his movement was contained.

The difference was Gutenberg. The printing press had arrived in Europe in the 1440s, and by 1517 there were presses in every significant city. The Theses were translated into German, printed and distributed within weeks — without Luther's involvement or, initially, his knowledge.

Between 1518 and 1525, Luther's writings accounted for something close to a third of all books sold in German. He was the first mass-media author in history. Church authorities were still operating at the speed of manuscript; the argument had already gone everywhere.

Worms, 1521

Summoned before Emperor Charles V and the imperial diet, shown a table of his books and ordered to recant, Luther asked for a day to think. The next day he gave his answer:

Unless I am convinced by the testimony of the Scriptures or by clear reason — for I do not trust either in the pope or in councils alone, since it is well known that they have often erred and contradicted themselves — I am bound by the Scriptures I have quoted and my conscience is captive to the Word of God.

The famous line "Here I stand, I can do no other" appears in the earliest printed accounts but not in the official transcript. Whether he said it or not, the substance was there, and it was the more radical part: councils and popes can err; Scripture cannot.

He was declared an outlaw. Any subject of the empire could kill him without legal consequence.

The five solas

The movement's convictions were later summarised in five Latin phrases, each with the word alone doing the work:

• Sola Scriptura — Scripture alone is the final authority. Not that tradition is worthless, but that it is answerable.
• Sola Fide — justification is by faith alone, not by faith plus works.
• Sola Gratia — by grace alone; God's unearned favour is the whole cause.
• Solus Christus — through Christ alone; one mediator, no other required (1 Timothy 2:5).
• Soli Deo Gloria — to God's glory alone. Bach signed his manuscripts SDG.

What it changed on the ground

The Bible in ordinary languages. Luther's German New Testament in 1522. Tyndale's English in 1526. Olivétan's French. These translations shaped their languages as much as their churches — Luther's Bible is to German roughly what the KJV is to English.

The priesthood of all believers. "You are a chosen race, a royal priesthood" (1 Peter 2:9). No spiritual caste system. A cobbler's work is as much a calling as a monk's — which reoriented the Protestant understanding of ordinary work permanently.

Congregational singing. Luther wrote hymns in the common tongue and put them in the people's mouths. A Mighty Fortress Is Our God is his.

Literacy. If everyone should read the Bible, everyone must be able to read. Protestant regions pushed universal schooling for that reason, with measurable long-term effects on literacy rates.

Married clergy. Luther, a former monk, married Katharina von Bora, a former nun. Their household became the model of the Protestant parsonage.

The Catholic response

Trent (1545–1563) is often written off as pure reaction. It was not. It abolished the sale of indulgences, required bishops to reside in their dioceses, and established seminaries to train clergy properly — genuine reforms of genuine abuses.

It also firmly rejected justification by faith alone and affirmed tradition alongside Scripture, hardening the division. And the Counter-Reformation produced remarkable figures — Ignatius of Loyola, Teresa of Ávila, Francis Xavier, whose missionary work reached Asia.

The honest reckoning

Naming these is not disloyalty to the Reformation. It is applying the Reformation's own principle — that no human authority is beyond correction by Scripture — to the reformers themselves.

What remains

The doctrinal recovery is the thing that lasted, and it is available to anyone who opens the letter to the Romans.

"For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes... For in it the righteousness of God is revealed from faith for faith, as it is written, 'The righteous shall live by faith'" (Romans 1:16-17).

The same sentence that opened a monk's prison in 1515 is still on the page.