You’ll encounter a person behind you in line anxious for you to hurry up. You might get annoyed by that person. It’s possible you’ll want to tell that person to back off. You’ll get upset — what’s that person’s problem?

Then you see them running off to be with their family. That person has noisy kids. They were anxious to get what something to make their kids stop crying.

Finally, you end up feeling sorry for that person.

Oh wait… you’ll also feel like a moron for allowing yourself to get upset.