I saw this one Facebook and it really was rather an interesting idea. To think that all things are mostly empty space. It is much like the heavens which is mostly empty space with some matter dispersed throughout. As above, so below or in this case As above, so within.
In metaphysics many believe that reality is shaped by the individual, which means it has to be a malleable substance for it to be changed by each person. If we are mostly not hear it would explain why those who practice magic have the ability to shape and reshape the world around them.
Perhaps the Hindus and the Buddhist are right... we are nothing more than mere illusions that exists in the greater part of the divine. The idea we live in a holographic universe it not so bizarre after all.