I wrote a post once called 'Patterns of energy' that went into this somewhat. Since I like to think about it so much, I want to put into written words my thoughts for tonight. Simply put, we do not exist. Or put another way, we do not exist the way you think we do.
Our world of physics is a wonderful thing. Its why I miss truthsayer's 'cosmic cafe' posts so much. There was a lot of interchange on this subject. Science has spent a great deal of time with it's tools looking for the fundamental quality of matter and the answer may be closer than we expect.
Particle physics tears apart matter in the search for its basic building block. They break open the atom and find electrons, protons and neutrons. They break those open and find nothing more than particles with a lifespan so short as to be almost immeasurable. Break a particle open in a different way, find a different looking particle.
If you leave those particles completely alone, they revert to a 'wave form' which is massless. Its that way with all particles. Its a fascinating thing really. One example is scientists fire a photon (particle of light) from a photon gun at a barrier with two slits. The particle doesn't know which to go through, so it reverts to wave form, goes through both simultaneously and reverts back to particle form to be collected on a photographic plate.
What it comes down to is that anything is a particle only if it is 'interferred' with. If you look at it, it exists, if you don't, it doesn't.
Two of the greatest quantum physicists, Werner Heisenburg and Neils Bohr met in Copenhagen at one time to discuss what quantum theory was telling them. After a couple weeks of discussing this, the Copenhagen Interpretaion was formed. What it says basically is that there is no deep reality, or put another way, atoms are not 'things'.
The basic constituants of elementary particles are 'trapped light', or energy. Everything comes down to energy and energy contains no mass. Therefore, nothing in the universe is actual matter. What we see, and everything around us, is made from gravitationally trapped energy.
It is certainly difficult to accept the fact that all we see and touch is an illusion at the fundamental level. Us, the moon, the stars, all an illusion.
So what are we? We are pure energy. Everything is.
That energy contains an intelligence in a way we cannot fathom. The cosmos is an intelligent energy in motion.
Some call it God.



