"Not long ago, I happened upon an instance of the teaching power of these nonsense tales, so amusing and convincing that I cannot forbear to share it. A primary teacher who heard me tell Epaminondas one evening, told it to her pupils the next morning, with great effect. A young teacher who was observing in the room at the time told me what befell. She said the children laughed very heartily over the story, and evidently liked it much.
About an hour later, one of them was sent to the board to do a little problem. It happened that the child made an excessively foolish mistake, and did not notice it. As he glanced at the teacher for the familiar smile of encouragement, she simply raised her hands, and ejaculated, "’For the law’s sake!’"
It was sufficient. The child took the cue instantly. He looked hastily at his work, broke into an irrepressible giggle, rubbed the figures out, without a word, and began again. And the whole class entered into the joke with the gusto of fellow-fools, for once wise.
It is safe to assume that the child in question will make fewer needless mistakes for a long time because of the wholesome reminder of his likeness with one who "ain’t got the sense he was born with." And what occurred so visibly in his case goes on quietly in the hidden recesses of the mind in many cases. One Epaminondas is worth three lectures."