By the early sixteenth century, the medieval church had drifted far from the Gospel it was meant to proclaim. Corruption was rampant. Clergy were often ignorant of Scripture—some priests could not even recite the Lord's Prayer or the Ten Commandments. The papacy had become a political institution preoccupied with wealth, power, and Renaissance splendor. And the common people, kept in spiritual darkness, sought salvation through rituals, relics, and payments they could ill afford.
The indulgence system epitomized everything wrong with late medieval religion. Originally granted for acts of penance, indulgences had evolved into a commercial enterprise. Johann Tetzel, a Dominican friar, traveled through Germany selling indulgences with the crude jingle: "As soon as a coin in the coffer rings, a soul from purgatory springs." The funds were destined for the construction of St. Peter's Basilica in Rome—a magnificent building funded by exploiting the fears of peasants for their dead loved ones.
Yet beneath the surface, hunger for authentic faith was growing. Movements like the Brethren of the Common Life emphasized personal devotion and Scripture reading. Renaissance humanism, with its cry ad fontes ("back to the sources"), was driving scholars to study the Bible in its original languages. The printing press, invented around 1450, made mass distribution of ideas possible for the first time. The kindling was dry; it needed only a spark.
Martin Luther: The Reluctant Revolutionary
Martin Luther (1483-1546) did not set out to divide the church. An Augustinian monk and professor of theology at Wittenberg, Luther was tormented by his own sinfulness and the question of how a holy God could accept an unholy sinner. He tried everything the church prescribed—confession, fasting, pilgrimage, self-flagellation— but found no peace.
The breakthrough came through his study of Romans. Wrestling with Romans 1:17—"the righteousness of God is revealed... the righteous shall live by faith"—Luther suddenly understood. The "righteousness of God" was not the standard by which God condemns sinners but the gift by which He justifies them. Righteousness comes not through human effort but through faith in Christ.
"For in it the righteousness of God is revealed from faith for faith, as it is written, 'The righteous shall live by faith.'"
— Romans 1:17Luther later wrote: "I felt that I was altogether born again and had entered paradise itself through open gates. Here a totally other face of the entire Scripture showed itself to me." This experience of evangelical conversion—justification by grace alone through faith alone—became the heart of Reformation theology and the engine of Reformation evangelism.
The Ninety-Five Theses
On October 31, 1517, Luther posted his Ninety-Five Theses on the door of the Castle Church in Wittenberg. Originally intended as an invitation to academic debate about indulgences, the theses spread like wildfire thanks to the printing press. Within weeks, they were being read across Germany; within months, across Europe.
Luther's theses struck at the heart of the indulgence system and, by implication, at papal authority itself. Thesis 62 declared: "The true treasure of the church is the most holy gospel of the glory and grace of God." This was evangelism in theological form—redirecting people from human inventions to the Gospel itself.
Luther's Evangelistic Methods
Luther was not merely a theologian; he was a communicator who understood how to reach ordinary people:
- Vernacular preaching — Luther preached in German, not Latin, making Scripture accessible to common people. He preached constantly—sometimes daily—with clarity and passion.
- Bible translation — His German Bible (New Testament 1522, complete Bible 1534) put Scripture directly into people's hands. Its literary quality shaped the German language itself.
- Hymns — Luther wrote hymns like "A Mighty Fortress Is Our God" that taught theology through music. Congregational singing became a hallmark of Protestant worship.
- Catechisms — His Small Catechism (1529) provided a simple summary of Christian faith for household instruction. Parents could now teach their children the Gospel.
- Printing — Luther published prolifically—sermons, pamphlets, treatises, commentaries. He understood the power of mass media.
Between 1518 and 1525, Luther's writings accounted for roughly one-third of all books published in German. He was the first "best-selling author" in history and the first to leverage mass media for religious transformation.
Luther's message was simple: salvation is a gift received through faith, not a reward earned through works. This was not new doctrine—it was the recovery of apostolic Christianity. But to people who had been taught that their salvation depended on their efforts, it was revolutionary good news.
Other Reformers and Their Evangelistic Contributions
Ulrich Zwingli and the Swiss Reformation
Ulrich Zwingli (1484-1531) led the Reformation in Zurich independently of Luther. A humanist scholar and priest, Zwingli came to evangelical convictions through his own study of Scripture and began preaching systematically through books of the Bible— a practice called lectio continua.
Zwingli's approach was thoroughly biblical. He removed from worship everything not explicitly commanded in Scripture—images, organs, elaborate ceremonies. What remained was the Word: read, preached, and applied. The centrality of expository preaching in Reformed churches traces back to Zwingli's Zurich.
John Calvin and Geneva
John Calvin (1509-1564) transformed Geneva into what John Knox called "the most perfect school of Christ that ever was in the earth since the days of the apostles." A second-generation Reformer, Calvin systematized Protestant theology in his Institutes of the Christian Religion and modeled what a thoroughly Reformed city might look like.
Calvin's evangelistic legacy includes:
- The Geneva Academy — Founded in 1559, it trained pastors and missionaries who spread Reformed Christianity across Europe. Students came from France, Scotland, England, the Netherlands, and beyond.
- Missionary vision — Calvin sent missionaries to France, Brazil, and elsewhere. He understood that the Gospel was for all nations.
- Systematic catechesis — His catechism trained generations in Reformed doctrine.
- Church discipline — The Consistory maintained moral and doctrinal standards, creating a community that adorned the Gospel.
Though sometimes caricatured as coldly intellectual, Calvin had a burning passion for evangelism. He wrote: "The Lord has appointed ministers of his Gospel to be spiritual fathers... we must endeavor to bring all those whom we can to the unity of the faith."
The Radical Reformation: Anabaptists
The Anabaptists (meaning "re-baptizers") represented a more radical reform. Rejecting infant baptism, they insisted on believers' baptism— the baptism of those who had made a conscious profession of faith. This was evangelism embedded in ecclesiology: the church should consist only of regenerate believers.
Anabaptist evangelism was intensely personal. They traveled from village to village, sharing their faith and forming small communities of believers. They were also intensely persecuted—drowned, burned, and beheaded by both Catholics and Protestants. Yet persecution only spread their movement, as martyrs' faithfulness inspired others to investigate their beliefs.
The Martyrs Mirror (1660), collecting accounts of Anabaptist martyrdoms, became second only to the Bible in Anabaptist households. Like the early church, they discovered that the blood of martyrs is seed.
The English Reformation and the Book of Common Prayer
The English Reformation, though politically complicated, produced lasting evangelistic tools. Thomas Cranmer's Book of Common Prayer (1549, revised 1552) put the liturgy in English and embedded evangelical theology in worship. For centuries, English-speaking Christians would absorb the Gospel through Cranmer's magnificent prose.
The publication of the English Bible—Tyndale's translation (1526), the Great Bible (1539), the Geneva Bible (1560), and finally the King James Version (1611)—made Scripture the common possession of the English people. Tyndale's dying prayer—"Lord, open the King of England's eyes"—was answered beyond his imagination.
The Five Solas: Evangelism in Summary
The Reformers' message can be summarized in five Latin phrases, the Five Solas. Together, they constitute both a theology and an evangelistic appeal:
Sola Scriptura — Scripture Alone
The Bible is the sole infallible authority for faith and practice. Church tradition, papal pronouncements, and human reason are subordinate to Scripture. This principle liberated believers from dependence on a hierarchical magisterium and gave them direct access to God's Word.
Sola Gratia — Grace Alone
Salvation is entirely a gift of God's grace, not a reward for human merit. We are saved not because we deserve it but because God is merciful. This strips away all boasting and redirects all glory to God.
Sola Fide — Faith Alone
Justification comes through faith, not through works. Faith is the instrument by which we receive Christ's righteousness. Good works follow salvation as its fruit but do not contribute to its cause.
Solus Christus — Christ Alone
Jesus Christ is the only mediator between God and humanity. We need no saints, no Mary, no priests to intercede for us. Christ's work is sufficient; nothing can be added to it.
Soli Deo Gloria — To God Alone Be Glory
All glory belongs to God. Salvation is His work from beginning to end. Human pride is excluded; divine grace is exalted.
"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast."
— Ephesians 2:8-9The Five Solas are not merely historical artifacts. They remain the clearest summary of the Gospel message. When we evangelize, we are calling people to trust in Scripture alone, grace alone, faith alone, Christ alone—for the glory of God alone.
The Impact of the Reformation on Evangelism
The Reformation fundamentally reshaped how Christians understood and practiced evangelism:
The Priesthood of All Believers
Luther's doctrine of the priesthood of all believers democratized evangelism. Every Christian has direct access to God and responsibility to share the faith. Witness is not reserved for clergy; it belongs to the whole people of God.
Vernacular Scripture and Worship
By translating the Bible and liturgy into common languages, the Reformers made the Gospel accessible to ordinary people. This was evangelism through education—equipping believers to understand their faith and share it with others.
Catechesis and Family Instruction
The emphasis on catechisms transformed households into schools of faith. Parents were expected to teach their children. The faith was passed down through generations, not merely through institutional channels.
Preaching as Central
Reformation churches made the sermon central to worship. The pulpit replaced the altar as the focal point. Expository preaching—explaining Scripture passage by passage—became the primary means of evangelism and discipleship.
Doctrinal Clarity
The Reformation produced confessions of faith that articulated the Gospel with precision. The Augsburg Confession, the Heidelberg Catechism, the Westminster Standards, and others gave believers clear summaries of what they believed and why.
The Reformation also had failures. Religious wars devastated Europe. Protestants persecuted Anabaptists and sometimes each other. Doctrinal precision sometimes hardened into dead orthodoxy. These failures remind us that right doctrine must be accompanied by right practice and right spirit.
Lessons for Today
What can we learn from Reformation evangelism?
- Clarity matters — The Reformers were precise about the Gospel. Fuzzy theology produces fuzzy evangelism. We must know what we believe and communicate it clearly.
- Scripture is central — Everything the Reformers did flowed from their commitment to Scripture. Bible translation, distribution, and teaching remain foundational to evangelism.
- Media is a tool — Luther leveraged the printing press; we have digital tools. New technologies should be harnessed for Gospel proclamation.
- Ordinary believers matter — The priesthood of all believers means every Christian is called to witness. Evangelism is not outsourced to professionals.
- Teaching supports proclamation — Catechesis, preaching, and education create depth. Evangelism aims not merely at decisions but at understanding.
- Culture carries content — Hymns, liturgy, and art shaped generations. We should not neglect the power of cultural forms to transmit truth.
- Suffering may follow — The Reformers faced exile, imprisonment, and death. Faithful witness may be costly. But the Gospel is worth the cost.
The Reformation was not a peripheral event in church history; it was the recovery of the Gospel itself. The message the Reformers rediscovered—salvation by grace alone through faith alone in Christ alone—remains the message we are called to proclaim.
"I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes."
— Romans 1:16Discussion Questions
- Luther leveraged the printing press to spread the Gospel. What modern technologies or platforms could be similarly leveraged for evangelism? How can we be as innovative as the Reformers while remaining faithful to the message?
- The Five Solas summarize the Reformation's Gospel message. Can you explain each one in your own words? Which of these truths most needs to be recovered in your evangelistic context?
- The Reformers emphasized the 'priesthood of all believers'—that every Christian is called to witness. What barriers prevent ordinary believers in your church from sharing their faith? How can these barriers be addressed?