The bondage of the will, a topic Martin Luther defended 500 years ago, reminds us that our salvation rests not in our bound will but in Christ’s finished work.

Let’s begin at the ending.

In the conclusion to his 1525 book The Bondage of the Will, Martin Luther wrote, “You and you alone have seen the question on which everything hinges, and have aimed at the vital spot.” In the original Latin, it’s even more vivid: “You have me by the jugular.” That’s not where you want to be attacked!

But who had him? And how could a topic like the bondage of the will be the jugular of Luther’s theology? What does that have to do with the Reformation solas we know so well—Scripture alone, grace alone, faith alone?

In a word: everything.

Erasmus and On the Freedom of the Will

Luther aimed that jugular remark at Desiderius Erasmus. Erasmus was the intellectual giant of his generation, a scholar and linguist whose eloquence bordered on the miraculous. Luther had gratefully used Erasmus’ edition of the Greek New Testament when translating the Bible into German.

Before Erasmus went for Luther’s jugular, they shared mutual admiration for each other. Both wanted reform. Erasmus wanted the church to clean up its corruption and live by biblical morals. Luther agreed with the need for reform but saw a deeper problem: false teaching.

Yet by the mid-1520s, Erasmus faced pressure from the church to distance himself from Luther. When he finally gave in, he chose to write against Luther on the role of free will in salvation. Years earlier, at the Heidelberg Disputation of 1518, Luther had said, “Free will after the Fall exists in name only” (The Annotated Luther, Vol. 2).

Erasmus thought otherwise. In September 1524, he published a book against Luther called On the Freedom of the Will. In it, he defined free will as the power by which people can turn either toward salvation or away from it. He argued that at least some exercise of free will was necessary for salvation.

Why? For two big reasons. One, Erasmus wanted to defend God’s justice. If people have free will, then those who reject salvation have no one to blame but themselves when they are damned. They could have chosen differently. God, then, is not unfair when he condemns. Two, Erasmus wanted to promote morality. He feared that if people believed they had no free will, they would stop trying to live good lives.

Erasmus considered this a topic that Christians could legitimately debate. Since he thought the Bible was obscure and difficult to understand, he criticized Luther’s certainty and bold assertions about free will.

Luther and The Bondage of the Will

Luther, however, saw this as something about which he had to be absolutely certain. So in December 1525, he answered Erasmus with The Bondage of the Will.

First, Luther tackled Erasmus’ doubts about Scripture’s clarity. He admitted that there are difficult passages in the Bible, but that is due to our lack of understanding, not Scripture itself. Luther insisted that nothing is more important to Christians than confident declarations of biblical truth: “Take away assertions and you take away Christianity.” Scripture was written to reveal God’s truth, not conceal it.

The bondage of the will is a reminder that your salvation is not in your hands; it is securely in Christ’s hands.

That’s why Luther refused to leave the matter of free will concealed by uncertainty. The Bible is clear: Only God has true free will. This doesn’t mean that we cannot make day-to-day decisions about things like where we work, what we wear, or when we sleep. In such matters below us, we exercise legitimate choice. But in spiritual matters, in things above us, we are powerless. When it comes to believing, trusting, or coming to God, the will is bound.

Why? Because Scripture also clearly teaches original sin.

Erasmus believed that a spark of ability remained in humanity after the fall, allowing the will to contribute slightly to salvation. Luther disagreed: “Scripture represents man as one who is bound, wretched, captive, sick, and dead.” The dead cannot will themselves back to life. The will is bound by sin; it’s not free to choose Christ. “Everyone who sins is a slave to sin” (John 8:34). If we are spiritually dead, then we cannot begin, continue, or complete our salvation. Instead, we must depend wholly on God’s grace in Christ.

Luther argued that claiming even a sliver of free will in salvation was really salvation by works. If salvation is by grace, it must be wholly by grace from beginning to end. Otherwise, Christ’s work would be incomplete, and God would be robbed of glory.

But if we can’t exercise our will and choose to believe, how does faith happen? Not by choice, but as a gift. Jesus says, “No one can come to me unless the Father who sent me draws them” (John 6:44). God himself works through his Word and sacrament to give us the new life of faith. Believing is a miracle of grace.

This answers Erasmus’ fear about morality. Far from discouraging morality, recognizing the bondage of the will frees us to serve God gratefully—not to earn his love, but because he already loves us.

But what about Erasmus’ concern that God is unjust to condemn those whose will is bound? Luther didn’t offer a philosophical answer to this question. Instead, he urged Christians to trust what God has revealed: his grace and mercy in Christ. Trusting Scripture’s clear assertions, we will one day see in heaven’s glory how this seemingly insoluble problem is resolved.

Why this matters now

Do you see now why Luther called this his jugular? Defending the doctrine of the bondage of the will involves the life-sustaining nexus of what Scripture alone asserts: Salvation comes by grace alone, through faith in Christ alone, and that faith itself is God’s free gift.

And while the phrase “bondage of the will” may sound grim, it really is quite comforting. If salvation depends on our free will to choose Christ, nagging doubts will always remain. This uncertainty led Luther to confess, “Even if it were possible, I should not wish to have free choice given to me, or to have anything left in my own hands by which I might strive toward salvation.” Salvation is too important to rest in imperfect human hands.

The bondage of the will, however, is a reminder that your salvation is not in your hands; it is securely in Christ’s hands. He did everything: lived perfectly, died innocently, rose gloriously, and gave you the faith to believe through Word and sacrament. From first to last, your salvation is his work.

So, let’s end at the beginning.

In his preface to The Bondage of the Will, Luther thanked Erasmus: “I owe you no small debt of thanks for making me sure of my own view.” Five hundred years later, we owe Erasmus that same debt. By attacking the jugular, Erasmus made Luther—and us—sure that salvation rests not in our bound will but in Christ’s finished work.

Quotations from Luther’s Works, American Edition, Vol. 33 © 1972 Fortress Press. All rights reserved. Used by permission.

Author: Noah Headrick
Volume 112, Number 12
Issue: December 2025