One might look at the world and be convinced that God exists, but all he sees is the world. What he looks at remains still, block like, and silent. We are the only ones speaking or thinking or being convinced. God must be! Silence.
Still, for all of this we are still some aspect of the world. The stones cannot speak, and perhaps we cannot speak for them, but we can speak for ourselves. We are natural too. Why explain the world in such a way as to leave oneself out of it? That we can so easily explain the world and forget that we are in it tells something too.