A mouse bit a bull on the nose and slipped into a hole in a wall before the bull could react. The bull charged at the wall without making any impression, time and again, until he had worn himself out, at which the mouse darted out and bit the exhausted bull on the nose again. The bull could do nothing except fume with anger. “You big ones don’t always win,” squeaked the mouse from his hole, “Sometimes we little ones come off best.”
Aesop
Anecdotes, Fables and Talks 