Question

I need help finding the theme...

Read the fable and use supporting evidence from the story to identify its theme. Answer in a minimum of three complete sentences.
A Lion asleep in his lair was woken up by a Mouse running over his face. Losing his temper he seized it with his paw and was about to kill it. The Mouse, terrified, piteously entreated him to spare its life. "Please let me go," it cried, "and one day I will repay you for your kindness." The idea of so insignificant a creature ever being able to do anything for him amused the Lion so much that he laughed aloud, and good-humorles l