By remembering this one quickly, we don't need to actually ask the question aloud -- we remember the answer before we could even ask it.
Also, we end up needing to remember it when we're mired down in the details of quotidian existence. We need to be reminded of the bigger picture in those circumstances, that is, to get a proper perspective of all the little shit so we'll see how little it is.
I keep saying "we" but I'm really only referring to myself. I don't know that very many people see life the way I do. This is just how I work.