And, no, God does not exist in things. As I've already said, things exist in God. He is the creator of all things, and their being holds together in him. In one sense, God is always in the act of creating. I don't mean creating in the sense of making one thing today and another thing tomorrow. I mean that God is always in the process of creating and holding all things together at all times, so that if God were to quit doing so, all things would cease to exist except for God who would still be because God always is. If God were to cease his act of continuous creation nothing that now is would continue to be. We would simply be gone, and there wouldn't even be dust left to give evidence that we ever were nor a place to view the emptiness of the universe from, for the universe would be no more as well. And yet, God would still be. And would be then, as now, the totality of all that is.