When we say the whole world is full of God's glory in prayer we are referring to position, This is similar if I say Joe is in the supermarket. In neither case is one saying anything that relates to what makes someone to be something.
Position is a predicate that does not say anything about the essence.
One can come to God from anywhere. But he means it in the sense that one is never lost from God. No matter have far one has fallen he can always open his mouth and ask God for help-- and God hears him and sometimes answers also!