Aesop's Fables: the lion and the ass

 One day as the Lion walked proudly down a forest aisle, and the animals respectfully made way for him, an Ass brayed a scornful remark as he passed.

The Lion felt a flash of anger. But when he turned his head and saw who had spoken, he walked quietly on. He would not honor the fool with even so much as a stroke of his claws.

Lesson: Do not resent the remarks of a fool. Ignore them.

(The Aesop for Children With pictures by Milo Winter, 1919, p.28)