What "logos, pathos, ethos" mean

A term you'll meet in Aristotle's rhetoric.

In Book I of his Rhetoric, written around 350 BCE, Aristotle identified three modes by which a speaker persuades an audience. He gave each one a Greek name. Twenty-four centuries later, the framework is still the cleanest tool for analysing any argument — political, literary, advertising, or otherwise.

Logos — the appeal to reason

Logos (λόγος, "word" or "reason") is persuasion through evidence and logic. A logos-based argument relies on facts, statistics, causal chains, syllogisms, and verifiable claims. When a prosecutor walks the jury through a timeline of phone records, that's logos. When a scientist publishes a meta-analysis, that's logos.

Logos is the mode our culture officially endorses. It is also, in practice, the least decisive — humans rarely change their minds because of evidence alone.

Pathos — the appeal to emotion

Pathos (πάθος, "suffering" or "experience") is persuasion through the audience's feelings. A pathos-based argument makes the audience angry, frightened, hopeful, ashamed, or moved. When a charity advert shows a single grieving child rather than a statistic about millions, that's pathos. When a closing argument asks the jury to imagine themselves as the victim, that's pathos.

Pathos is what most actually-effective persuasion runs on. It is also the mode most easily abused; demagogues are pathos specialists.

Ethos — the appeal to character

Ethos (ἦθος, "character") is persuasion through the speaker's credibility. Why should we believe you on this question? An expert citing their qualifications, a politician referencing their war record, a friend leaning on years of trust — all ethos. Brand-building is ethos at corporate scale.

Aristotle considered ethos the most powerful of the three. Long before the audience evaluates your argument, they have decided whether you are worth listening to.

The three together

Great persuasion combines all three. The Gettysburg Address — 272 words — is logos (a clear historical argument about the meaning of the Civil War), pathos (the language of birth, death, and new birth), and ethos (Lincoln speaking from the moral authority of the office and the sanctified ground) at once. Strip out any of the three and the speech collapses.

How to read it in context

When you encounter a piece of rhetoric you find compelling — and especially one you find compelling and don't trust — ask which of the three modes it is working in. Naming the move is the first step to resisting it.

Try Lexio

Look up any word like this — in any book, in any browser.

Lexio is a free Chrome extension and web app that reads a word's actual context and tells you what it means in this sentence, not from a generic dictionary.

Try Lexio — free →