This is crucial advice because there are idiots EVERYWHERE. (It's really kind of nuts how many there are in the world.) So when you're confronted with idiotism, which you will be, probably daily, don't let it ruin your day. Deal with the idiotic behavior and move on with a cheerful attitude knowing full well that at least you're not that dumb.
Feel free to share this with friends or family on social media or pinterest. Or print it out and take it to the office.