Fight until hell freezes over, then fight on the ice.
Indeed.
"If you will not fight for the right when you can easily win without bloodshed; if you will not fight when your victory will be sure and not too costly; you may come to the moment when you will have to fight with all the odds against you and only a small chance of survival.
There may even be a worse case: you may have to fight when there is no hope of victory, because it is better to perish than to live as slaves."
-- Winston Churchill