Sorry to be insulting, but it’s true.
Okay, maybe that’s an exaggeration. It’s not exactly nothing you’re made of, but it’s really not much. As you know, we’re made of atoms and the atom is a big load of nothingness with a tiny nucleus and a few electrons spinning round it.
If the nucleus of an atom was the same size as a grain of rice and it was sitting in the middle of an empty football stadium, the electrons would be spinning around the outer reaches of the atomic stadium…