The mill cannot grind with the water that is past.
The pitcher goes often to the well but is broken at last.
The spirit is willing, but the flesh is weak.
There are lees to every wine.
There is no rose without a thorn.
There's no fool like an old fool.
They that sow the wind, shall reap the whirlwind.
Time and tide wait for no man.
To add fuel (oil) to the fire (flames).
To cast prudence to the winds.
To every thing there is a season.
To know everything is to know nothing.
To plough the sand.
To take the bull by the horns.
Tomorrow come never.
Truth will out.
Vengeance is a dish that should be eaten cold.
The crow, when travelling abroad, came back just as black.
The enemy of my enemy is my friend.
The grass is always greener on the other side of the fence.
The mills of the gods grind slowly, but they grind exceedingly fine.
The pot calls the kettle black.
The squeaking wheel gets the grease.
There are many ways to skin a cat.
There is no rule without an exception.