It can be used as a theme BUT by itself it is a colloquialism.
Yes, the saying "don't judge a book by its cover" is a common theme that emphasizes the importance of looking beyond superficial appearances to discover the true qualities or character of someone or something. It encourages people to be open-minded, empathetic, and avoid making snap judgments based solely on outward appearances.
Yes, many movies. You can find movie quotes at subzin website. A related link below shows movies with variations of the phrase, "don't judge a book by its cover."
adage
don't judge a book by its cover
dont judge a book by its cover!
Don't judge a book by its cover
Don't judge a book by its cover
never judge a book by its cover
No matter what look in the outside doesn't effect the inside.
the theme of hoodwinked is ur moma hahahahahahhaha
the last little blue envelope
don't judge a book by its cover and don't trust a person right off your first instinct
One theme is not to judge a book by its cover . And to ignore the ignorance of racism that goes on today .
well if your talking of the old saying, then it would be that you never judge a book by its cover. In other words, you shouldn't make an impression of something if you have never found out about it. Hope this helps :)
You can't judge a book by lookin' at the cover