If you have a good case, try to compromise; if you have a bad one, take it to court.
More French Proverbs:
Don't find fault with what you don't understand.French
Every potter vaunts his own pot.
French
He who does not bait his hook fishes in vain.
French
Serve as a serf or fly like a deer.
French
To eat and drink, and sleep together, is marriage, methinks.
French
Better ten people hurt than one dead.
French