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When law enforcers are not present, certain public members will take the opportunity to break the law.

A bad workman always blames his tools.

A careless or unskilled worker blames bad work on his tools rather than himself.

A new broom sweeps clean.

A person newly appointed is always eager and enthusiastic in his work.

Don't judge a book by its cover.

Do not be deceived by appearances.

Blood is thicker than water.

Family ties are stronger than any other.

Don't count your chickens before they are hatched.

Do not make plans based on something that has not happened.

Don't make a mountain out of a molehill.

Do not make a big fuss or issue over something minor or small.

Experience is the best teacher.

The best way to learn a job is to do it.

The last straw that broke (breaks) the camel's back.

The final thing that, when added to a bad or unpleasant situation, causes failure or ruin.

Make hay while the sun shines.

Seize opportunities.

Out of sight, out of mind.

You will soon forget friends you do not meet or keep in contact with.

Can a leopard change its spots? A leopard cannot change its spots.

A person's nature cannot change.

Too many cooks spoil the broth.

Too many people doing the same thing at the same time will not be successful.

We never miss the water till the well runs dry.

You only realize the importance of something when it is gone.

To put the cart before the horse.

To do something in an incorrect order.

Bite off more than one can chew.

To try to do something one is unable to do or incapable of doing.

Half a loaf is better than none.

It's better to have or receive less than one desires than to have or receive nothing at all.

If it's not one thing it's another.

The troubles seem to go on and on without end.

The sky is the limit.

There is no upper limit to something.

A trouble shared is a trouble halved.

Your troubles seem half as great when you discuss them with someone else.

A watched pot never boils.

If you watch or wait for something to get done or to happen it seems to take forever.

Two's company, three's a crowd.

It is always fun while there are only two people whereas the third person is an unwelcome intrusion.

Jump from the frying pan into the fire.

To go from a bad position to a worse one.

One swallow doesn't make a summer.

One success doesn't guarantee complete success.

Truth is stranger than fiction.