It's a bad bargain where nobody gains.
It takes two to make a bargain.
As well be hanged for a sheep as a lamb.
He that will not stoop for a pin will never be worth a pound.
Haste makes waste.
Set a thief to catch a thief.
When thieves fall out honest men come by their own.
There is honor among thieves.
Many a true word is spoken in jest.
A Scotch mist may wet an Englishman to the skin.
It takes all sorts to make a world.
If you dam a river it stagnates. Running water is beautiful water.
The nearer the bone the sweeter the meat.
All is fair in love and war.
The shortest answer is doing.
Time is a file that wears and makes no noise.
It is easy to be wise after the event.
What is sauce for the goose is sauce for the gander.
Boys will be boys.
As old as the itch.