The Lion and the Cougar
A pointed fable is told about a young lion and a cougar. Both thirsty, the animals arrived at their usual water hole at the same time. They immediately began to argue about who should satisfy their thirst first. The argument became heated, and each decided he would rather die than give up the privilege of being first to quench his thirst.
As they stubbornly confronted each other, their emotions turned to rage. Their cruel attacks on each other were suddenly interrupted. They both looked up. Circling overhead was a flock of vultures waiting for the loser to fall. Quietly, the two beasts turned and walked away. The thought of being devoured was all they needed to end their quarrel.
Moral of the story is that sometimes you will have to walk away from an argument and you also have to choose your battles wisely.