Huldrych Zwingli: Luthers Frenemy

When people think of the Reformation, they usually picture Martin Luther hammering away at the church door in Wittenberg. But while Luther was stirring up Germany, another reformer — just as bold, just as passionate, and arguably just as influential — was reshaping the church in Switzerland. His name was Huldrych Zwingli, and he deserves far more attention than he usually gets.

Zwingli’s story is one of conviction, conflict, and a theological disagreement so intense that it split the Protestant movement before it had even properly begun.

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A Reformer Before He Knew He Was One

Zwingli was born in 1484, just a year after Luther. He grew up in the Swiss Alps, studied in Basel and Vienna, and became a priest in Zurich. But unlike Luther, Zwingli didn’t have a dramatic “tower experience” or a crisis of conscience. His reforming instincts came from something far more ordinary: reading the Bible closely.

He preached through Scripture verse by verse — a radical idea at the time — and quickly realised that many church practices simply didn’t match what he was reading. Indulgences, clerical corruption, fasting rules, and the veneration of saints all came under his scrutiny.

By 1522, Zwingli was openly challenging church authority. By 1523, Zurich had officially embraced reform. And by 1525, the city had abolished the Mass entirely.

If Luther lit the match, Zwingli built a bonfire.

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The Lord’s Supper: Where Everything Fell Apart

For all their similarities, Luther and Zwingli had one major disagreement: the nature of the Lord’s Supper.

• Luther insisted that Christ’s body and blood were truly present “in, with, and under” the bread and wine.
• Zwingli argued that the Supper was a symbolic memorial, not a literal presence.

This disagreement came to a head in 1529 at the Marburg Colloquy, a meeting arranged to unite the Protestant movement. They agreed on 14 out of 15 theological points. But on the final point — the meaning of “This is my body” — neither would budge.

Luther famously chalked the words Hoc est corpus meum (“This is my body”) onto the table and refused to compromise. Zwingli, equally stubborn, insisted that Christ’s physical body was in heaven, not on the table.

The result? A split that shaped Protestantism for centuries.

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A Reformer in the Middle of a Battlefield

Zwingli wasn’t just a theologian — he was also a patriot. Switzerland was a patchwork of cantons, some Catholic, some Protestant, and tensions ran high. In 1531, conflict broke out between Zurich and the Catholic cantons.

Zwingli joined the battlefield as a chaplain… and was killed in combat.

It’s a dramatic end, and one that highlights the turbulent world he lived in. While Luther died in his bed, Zwingli died with a sword in his hand.

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Why Zwingli Matters Today

Zwingli’s influence is everywhere, even if his name isn’t.

• Many Protestant churches follow his symbolic understanding of the Lord’s Supper.
• His emphasis on Scripture alone shaped Swiss, Dutch, and later English reform movements.
• His reforms in Zurich laid the groundwork for Reformed theology, which Calvin later systematised.
• His approach to worship — simple, Scripture‑centred, and free from elaborate ritual — still shapes many churches today.

Zwingli may not be as famous as Luther or Calvin, but he was a foundational voice in the Reformation. He agreed with Luther on almost everything… except the one thing that mattered most to both of them.