One morning a Mule, who had too much to eat and too little to do,
began to think himself a very fine fellow indeed, and frisked about
saying, "My father was undoubtedly a high-spirited horse and I take
after him entirely." But very soon afterwards he was put into the
harness and compelled to go a very long way with a heavy load behind
him. At the end of the day, exhausted by his unusual exertions, he
said dejectedly to himself, "I must have been mistaken about my
father; he can only have been an ass after all."