Ok, so three people are at the Grand Canyon.

They're all lined up at the edge, ready to jump across!

No doubt someone would jump farther than the others, but
obviously ALL of them WOULD FALL SHORT of making it across.

Do you get the point?

Now let's make the analogy...

You may not be as "bad" as another person, but the truth is YOU HAVE
SINNED and therefore FALLEN SHORT of God's standard of perfection.