公案

Koan

Zen Buddhism · practice

A paradoxical question or statement used in Zen practice to break through conceptual thinking and trigger direct insight. 'What is the sound of one hand clapping?'. Koans are used in Rinzai Zen to short-circuit rational thought and trigger direct insight. Famous examples include 'What is the sound of one hand clapping?'

What is the sound of one hand clapping?

— Hakuin Ekaku (18th-century Rinzai Zen) — attributed to the Rinzai koan tradition

What Are the Key Facts About Koan?

  • Tradition: Zen Buddhism
  • Chinese: 公案
  • Category: Practice
  • Definition: A paradoxical question or statement used in Zen practice to break through conceptual thinking and trigger direct insight.

What Concepts Are Related to Koan?

Sudden Enlightenment 顿悟
Pedagogically related
Koans are a tool for triggering sudden enlightenment
 Memento Mori
Interpretively related
Both use provocative questions/thoughts to confront fundamental truths about existence

Guides That Go Deeper on Koan

What Is Koan
The definition guide owns the sourced context while the entity remains the concise Koan concept node.

Frequently Asked Questions About Koan

What is a koan?

A koan is a story, dialogue, or paradoxical question used in Zen training (especially Rinzai) to provoke doubt and break through conceptual, discursive thinking toward direct awakening.

What is the most famous koan?

A classic example is 'What is the sound of one hand clapping?' (Hakuin) or 'What was your original face before your parents were born?' Such questions have no logical answer and are meant to exhaust the rational mind.

How do you 'solve' a koan?

A koan is not solved by intellect but by sustained meditation (zazen) until the practitioner's understanding shifts; a teacher confirms the realization in dokusan (private interview).

Are koans only Zen?

Koan practice is distinctive to Zen (Chan), though parallel uses of paradoxical teaching appear in other traditions; in Zen it is a central method of transmission.

Further Reading