One day in the forest, there was a wolf and a fox. The wolf was timid and humble, but the fox was boastful and a bully. That day, fox bragged and said, "Oh, wolf! I am way more elegant and flexible than you! you are just a howling dog!" Wolf felt sad. Wolf didn't like how mean fox was and every time fox came near, wolf became skittish. In the end, wolf left the forest, and never came back. 
Remember not to brag if it means others will be hurt by it. 