A great warhorse comes upon a tiny sparrow lying on its back with its feet in the air, eyes squinched tightly shut with effort.
“What are you doing?” asks the horse.
“I’m trying to help hold back the darkness,” replied the sparrow.
The horse roars with laughter. “That is so pathetic. What do you weigh, about an ounce?”
And the sparrow answers, “One does what one can.”