To make a mountain out of a molehill.
To save one's bacon.
To treat somebody with a dose of his own medicine.
Treat them mean, keep them keen.
Two wrongs do not make a right.
The difference is wide that sheets will not decide.
The first faults are theirs that commit them, the second theirs that permit them.
The law is an ass.
The older the fiddler, the sweeter the tune.
The ship that will not obey the helm will have to obey the rocks.
The wind cannot be caught in a net.
There is honor among thieves.
There's many a good tune played on an old fiddle.
There's nowt so queer as folk.
Those who sleep with dogs will rise with fleas.
Time will tell.
To buy a pig in a poke.
To draw water in a sieve.
To have a finger in the pie.
To make both ends meet.
To send (carry) owls to Athens.
To use a steam-hammer to crack nuts.
True blue will never stain.
Two's a company, three's a crowd.
The dogs bark, but the caravan goes on.