1 Don’t judge a book by its cover.

Meaning: you cannot know what something or someone is like by looking only at that person or thing’s appearance

2 Don’t bite the hand that feeds you

Meaning : don’t act badly towards the person who is helping or has helped you

3 Don’t burn the candle at both ends.

Meaning : don’t work or do other things from early in the morning until late at night and so get very little rest

4 Don’t bark if you can’t bite.

Meaning : don’t promise something you can’t do

5 Don’t cross a bridge before you come to it.

Meaning : focus on a problem the moment you are facing it, and not earlier

6 Don’t fall before you’re pushed.

Meaning : don’t give up in the face of adversity

7 Don’t look a gift horse in the mouth.

Meaning : never criticize gifts

8 Don’t go between the tree and the bark.

Meaning : don’t interfere when two people are having an argument