who said "don't judge a book by its cover" ?
-1944 in the American journal American Speech as "you can't judge a book by its binding".
In 1946 the phrase first appeared in the murder mystery...
It means you don't just look at something (or someone)and judge it (or him) right away. Ex. You see a book you should maybe do some research or read a little of it. Don't just look at the cover and...
don't judge a book by it's cover means: don't think about something or someone a certain way just because of the way it looks. Example: don't think a book is boring just because it's cover is gray.