One day, two goats try to cross a weak and narrow bridge across the river. The goats are at either end of the bridge, but neither is ready to make way for the other. They come to the centre of the bridge and begin fighting about who should cross first. As they fight mindlessly, the bridge gives in, taking both the goats down into the river with it.
Moral: It is better to yield than to come to misfortune through stubbornness.
Meaning
Mindlessly - without justification and with no concern of consequences
Yield - get away from arguments, pressure or demand
Misfortune - unfortunate events or conditions (bad luck)
Stubbornness - not to change one’s attitude or position or something