Summary
The Cost of Discipleship was published in Germany in 1937, four years after Hitler came to power and two years after Bonhoeffer had taken over the underground seminary at Finkenwalde. The book opens with one of the most memorable phrases in twentieth-century Christian writing: the distinction between cheap grace and costly grace. Cheap grace is forgiveness without repentance, doctrine without obedience, sacraments without commitment — the church granting absolution wholesale without requiring anything in return. Costly grace is the call to follow Jesus, which means the cross. Bonhoeffer was writing against a German Protestant church he believed had sold its soul to accommodate the Nazi state, and his readers knew it.
The first part of the book is theological and polemical. Bonhoeffer argues that the Reformation's doctrine of grace by faith alone has been distorted into a license for moral passivity. Luther understood that faith and obedience were inseparable; his heirs had used his language to separate them. The corrective Bonhoeffer offers is not a return to works-righteousness but a recovery of the simplicity of the call: when Jesus says "follow me," the only response is to follow, not to deliberate.
The second part is an extended commentary on the Sermon on the Mount. Bonhoeffer reads the Beatitudes, the Lord's Prayer, and the commands about anger, lust, and nonresistance not as impossible ideals but as concrete descriptions of what life in the discipleship community actually looks like. His readings are often surprising — he resists both literalist and allegorizing interpretations and keeps returning the reader to the person of Jesus rather than to a system.
The book was written under political pressure that its author felt in his body. Bonhoeffer would be arrested in 1943 and executed in 1945, ten days before the end of the war in Europe. Reading The Cost of Discipleship knowing that context changes it. What reads in the abstract as demanding theology reads in light of his biography as a man talking himself into what he knew was coming.
Talk to The Cost of Discipleship like its author wrote you back.
Get the ideas that fit your life — not generic summaries.
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Key takeaways
- 1.
Cheap grace is grace without discipleship, forgiveness without repentance, the sacraments administered without requiring change. Costly grace is the gospel that confronts the whole person and calls them to follow.
- 2.
Bonhoeffer argues that Luther's doctrine of grace by faith was never meant to separate faith from obedience. The Reformation's heirs had used its language to license moral passivity.
- 3.
The call to discipleship is simple and direct: when Jesus says 'Follow me,' the response is either obedience or refusal. Deliberation is itself a form of refusal.
- 4.
The Sermon on the Mount is not a higher moral standard for special Christians. It is the description of ordinary life in the discipleship community — what following Jesus actually looks like.
- 5.
The cross is not metaphorical. Bonhoeffer insists that suffering and rejection are constitutive of Christian identity, not unfortunate side effects of an otherwise positive message.
- 6.
Community — the life of the church — is the context in which discipleship happens. Solitary Christianity is a contradiction in Bonhoeffer's framework.
- 7.
The book is a direct critique of the Deutsche Christen movement, the Nazi-aligned church that had subordinated Christian theology to National Socialist ideology. The polemic is embedded in the theology.
- 8.
Bonhoeffer reads nonresistance not as passive acquiescence but as a form of engagement that refuses the enemy's terms. The renunciation of violence is itself a kind of power.
Discussion questions
Use these on your own, with a book club, or as chat starters in Superbook.
- 1.
Bonhoeffer's distinction between cheap grace and costly grace was aimed at German Protestantism in 1937. Where do you see cheap grace operating in religious or secular contexts today?
- 2.
He argues that only the obedient person believes and only the believing person obeys — that faith and action are inseparable. Do you think that's true, and what evidence do you have from your own experience?
- 3.
The Sermon on the Mount commands that seem impossible — do not resist the evil-doer, love your enemies, take no thought for tomorrow. How do you read those commands?
- 4.
Bonhoeffer wrote this book while running an illegal seminary. How does the political context in which he wrote it change how you read its demands?
- 5.
He is critical of Christians who make discipleship a private spiritual project rather than a communal one. Do you agree that genuine faith requires a community, or is that a cultural claim dressed as a theological one?
- 6.
The book's most controversial claim is that deliberation in response to Christ's call is already a form of refusal. Does that leave any room for honest intellectual doubt?
- 7.
Bonhoeffer was executed for his role in the plot to assassinate Hitler — an act that seems to contradict the nonresistance he taught here. How do you reconcile the two?
- 8.
What distinguishes costly grace from legalism? Is Bonhoeffer's framework vulnerable to becoming a new form of works-righteousness?
- 9.
The book was written in a moment of political extremity. Does its framework translate to ordinary peacetime life, or is it specifically a theology for crisis?
- 10.
Bonhoeffer reads the Beatitudes as descriptions of the community, not prescriptions for individuals. How does that shift in reading level — from personal to communal — change the text for you?
- 11.
Which of the Sermon on the Mount's specific commands do you find most difficult to take seriously, and why?
- 12.
If you were to rewrite the opening cheap grace / costly grace distinction for your own context today, what would you be arguing against?
Themes
Frequently asked questions
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What does Bonhoeffer mean by 'cheap grace'?
Cheap grace is the church's offer of forgiveness and salvation without requiring repentance, commitment, or change. Bonhoeffer saw it as a betrayal of the gospel — grace reduced to a transaction that leaves the recipient undisturbed.
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Is The Cost of Discipleship a practical or a theological book?
Both. The first part is polemical theology; the second is a verse-by-verse commentary on the Sermon on the Mount. The practical content is embedded in biblical interpretation rather than presented as a self-help framework.
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Do I need to be Christian to get something from this book?
Some passages are inaccessible without familiarity with Protestant theological debates. But the core questions — what does commitment actually demand, and when does belonging become complicity — are broadly relevant.
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How does The Cost of Discipleship relate to Letters and Papers from Prison?
They represent different moments in Bonhoeffer's thought. The Cost of Discipleship is confident and programmatic; the prison letters are more fragmented and exploratory, asking questions the earlier book assumed were answered. Reading them together shows a significant development.
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Is Bonhoeffer's nonresistance consistent with his participation in the assassination plot?
Bonhoeffer himself said no, and he experienced significant guilt about the decision. He believed the extraordinary evil of Nazi Germany required an extraordinary response but never claimed that justified the action theologically. His willingness to hold that tension without resolving it is part of what makes him a serious figure.
