The best-laid plans go astray.

Once a thief, always a thief.

Bad money drives out good.

Don't mix business with pleasure.

Oil and water don't mix.

The course of true love never did run smooth.

One person's trash is another person's treasure.

Absence makes the heart grow fonder.

Clothes do not make the man.

Might is right.

A nod's as good as a wink to a blind horse.

Adversity and loss make a man wise.

Adversity makes strange bedfellows.

Jam tomorrow and jam yesterday, but never jam today.

A bad penny always turns up.

Handsome is as handsome does.

Small things amuse small minds.

All you need is love.

Keep your mouth shut and your eyes open.

Don't kill the goose that lays the golden eggs.

Don't rock the boat.

Don't count your chickens before they hatch.

Keep your friends close and your enemies closer.

You catch more flies with honey than with vinegar.

If you can't stand the heat get out of the kitchen.

Different strokes for different folks.

The best things in life are free.

Variety is the spice of life.

A fish always rots from the head.

The harder you work, the luckier you get.

Two heads are better than one.

Talk of the Devil, and he is bound to appear.

Curses, like chickens, come home to roost.

Love of money is the root of all evil.

That which does not kill us makes us stronger.

The customer is always right.

Hard work never did anyone any harm.

You can't fit a round peg in a square hole.

For everything there is a season.

Worrying never did anyone any good.

Don't wash your dirty linen in public.

You can't get blood out of a stone.

Don't test the depth of water with both feet.

Beauty is in the eye of the beholder.

Don't meet troubles half-way.

March comes in like a lion, and goes out like a lamb.

In for a penny, in for a pound.

A cat has nine lives.

A drowning man will clutch at a straw.

Where there's a will, there's a way.

Every man for himself, and the Devil take the hindmost.

Doubt is the beginning, not the end, of wisdom.

What's sauce for the goose is sauce for the gander.

Money is the root of all evil.

Nothing new under the sun.

An army marches on its stomach.

Dead men tell no tales.

Be slow in choosing, but slower in changing.

Truth will out.

Better to remain silent and be thought a fool, than to speak and remove all doubt.

Fine words butter no parsnips.

Build a better mousetrap and the world will beat a path to your door.

A rolling stone gathers no moss.

There's no smoke without fire.

Imitation is the sincerest form of flattery.

Judge not, that ye be not judged.

Cut your coat to suit your cloth.

Beat swords into ploughshares.

Into every life a little rain must fall.

There is many a good tune played on an old fiddle.

Knowledge is power.

Robbing Peter to pay Paul.

It takes a thief to catch a thief.

Let the dead bury the dead.

Don't let the cat out of the bag.

One might as well be hanged for a sheep as a lamb.

Walls have ears.

Out of sight, out of mind.

Opportunity never knocks twice at any man's door.

Don't shoot the messenger.

You can't take it with you.

Never look a gift horse in the mouth.

Let not the sun go down on your wrath.

All's fair in love and war.

If it ain't broke, don't fix it.

One year's seeding makes seven years weeding.

Hide in plain sight.

Don't spoil the ship for a ha'porth of tar.

A good man is hard to find.

Be careful what you wish for. You might just get it.

Enough is as good as a feast.

Go the extra mile.

Necessity is the mother of all invention.

Marriages are made in heaven.

Good things come to those who wait.

Jack of all trades, master of none.

When in Rome, do as Romans do.

Faith will move mountains.

Beware the Ides of March.

Who pays the piper, calls the tune.