Imagine that everyone is born with a little notebook. On that notebook is a list of objectives, priorities, and responsibilities you have, and everyone learns to manage them (since they had the notebook from the start).

Now, imagine you're the one kid who didn't get a notebook.
For whatever reason, you never got your notebook, and nobody ever told you that you're supposed to have one.

Most of your life you get by fine, but you're usually late, forgetful, have trouble focusing, and high priority things pile up amongst mundane stuff, and you're just lost.

Then, someone tells you about the notebook that everyone has.

You say "I never got one", but nobody understands.

"What you mean? Stop lying/being lazy/making up excuses!!! Get yourself together and use your notebook!"

But you're not lying.
You're not lazy.
It's not an excuse.

You try your hardest, but without the notebook you're never able to keep up with everyone else.

You manage to sometimes find a little piece of scrap paper. It's tiny and at any moment a wind can come and blow it away, and it often does, but you manage to do one or two things.

But it's never enough.

You keep screwing up and not getting things done because you're running around trying to catch that scrap of paper, and things around you keep piling up.