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Religion within the Bounds of Bare Reason

Immanuel Kant · 1793

Kant's 1793 book grounding religion in morality, which criticised church ritual and hierarchy and led to royal censorship.

The controversial work that led to Kant being censored and ordered by the king to stop writing on religion.

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Title page of the 1793 German edition of Die Religion innerhalb der Grenzen der bloßen Vernunft, presented by Immanuel Kant, printed in Königsberg by Friedrich Nicolovius. Yellowed paper with black Gothic and roman type.
Immanuel Kant, Religion within the Bounds of Bare Reason, 1793. Königsberg: Friedrich Nicolovius.

About this source

What it is

This is a 1793 book by Immanuel Kant, published in four parts, that examines the relationship between religion, morality and reason. Kant criticises ritual, superstition and church hierarchy, arguing that true religion should be grounded in rational morality rather than historical traditions.

Why it matters

Publishing parts of this work caused serious trouble for Kant: King Friedrich Wilhelm II's censor blocked part of it from appearing in a journal, and after Kant published the full book anyway, he received a royal order forbidding him from writing or speaking publicly about religion. Kant obeyed until the king died. The book shows the risks Kant took to publish his ideas and the tension between philosophy and state authority in his time.

Look closer

  • Why might Kant's ideas about religion have worried the king's censors?
  • What does Kant's workaround of routing the book through a university tell us about his determination?
  • How does this episode show limits on free expression in 18th-century Prussia?

This book is part of the curated material that grounds the AI version of Immanuel Kant on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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Title page of the 1781 first edition of Kant's Critique of Pure Reason. Blackletter title reads Critik der reinen Vernunft, von Immanuel Kant, Professor in Königsberg. Below: Riga, verlegts Johann Friedrich Hartknoch, 1781, with a floral wreath ornament.Book

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