The closest concept I can think in illustrating what god is just look to the bees. We are each one tiny little eye to the bigger bee. A bee has many eyes. We are the eye, the bee is god. Together we make up one. hehe
Or you can say we are individual cells of god and together we make up the one true god or collective conscious. The Cathars believed this, just one reason they were tortured and killed.
We all are in a state of becoming who we were from the very beginning, only now we have individual bodies. :-)