You can't make omelets (or omeletts) without breaking eggs.
Yesterday will not be called again.
Words cut (or hurt) more than swords.
Wine is mirror of the mind.
Who keeps company with the wolf will learn to howl.
Where there's reek there's heat.
When three know it, all know it.
We should never remember the benefit we have offered nor forget the favour received.
Well begun is half done.