All chapters

Beyond Good and Evil · Chapter

Chapter 166 explained

A brief aphorism on the involuntary truth-telling of the body, contrasting conscious speech with unconscious physical expression.

What happens

A brief aphorism on the involuntary truth-telling of the body, contrasting conscious speech with unconscious physical expression.

Themes in this chapter

  • Psychology as the Fundamental Science

    Examines the unconscious revelation of truth through physical 'grimace,' positioning psychology as a tool to uncover what language conceals.

Characters to notice

  • The Narrator

    Delivers the aphoristic observation on the duality of communication.

Key passages

  • One may indeed lie with the mouth; but with the accompanying grimace one nevertheless tells the truth.

    While words can be used to deceive, the body's involuntary expressions inevitably reveal the truth.

    Highlights the conflict between conscious deception and unconscious honesty, a core psychological insight.