Can't (or don't) Judge a Book by Its Cover

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Also: Don't judge a book by its cover

Meaning

Judge a book by its cover, one can't: You should not make decisions or form opinions based solely on outward appearance without knowing more about someone or something.

Usage

Both variants, using can't and don't are common.

"He wears t-shirts and jeans and drives a rusty pickup truck, but he runs a successful company. It just goes to show, you can't judge a book by its cover."

"I know you first impression of Jonothan was not good, but don't judge a book by its cover."

Origin

Used since the first half of the 1900's.

This idiom draws an analogy with deciding whether a book is good or bad by only looking at its cover, when, in fact, you cannot really judge the quality of a book without reading it.

More Can't Idioms

More Can't Idioms

More Cover Idioms

More Cover Idioms

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