You can't tell a book by its cover.
You can't tell a book by its cover.
Meaning in plain English
The saying denies that a book’s cover tells its whole value. As an analogy, a surface impression does not settle what something is like.
Example
Someone reads the details of an unfamiliar option before deciding whether it suits their needs.
Deeper explanation and when to use it
Tell concerns the information a presentation provides rather than banning all first impressions. A useful application seeks what is relevant beneath the surface without assuming appearances are always deceptive. The phrase offers no guarantee about the quality eventually found.
When to use it
Use it to discuss the limits of a surface impression.
Keep in mind
Further inspection is not guaranteed to reveal either excellence or deception.
Edsverb editorial interpretation · agent reviewed · 2026-10-05. This explains the saying; it does not establish its historical origin.
- Source
- Contributor-provided proverb reference
Supplied reference A; unit 644; PDF page 93
Reuse and collection notes ↗ - Attribution confidence
- traditional · supplied collection
Preserved as printed; independently unverified. - Historical coordinate
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