I read a similar ditty in the Reader's Digest some years ago.A new teacher was trying to make use of her psychology courses. She started her class by saying,
Everyone who thinks they're stupid, stand up!'
After a few seconds, Little Larry stood up. The teacher said, 'Do you think you're stupid, Larry?'
No, ma'am, but I hate to see you standing there all by yourself!'
Here's something in the vein of what I speak....but anything that makes you stop and smile is cool...