De Somniis (lib. i-ii)

For, in good truth, the continual stream of the divine word, being borne on incessantly with rapidity and regularity, is diffused universally over everything, giving joy to all.

And in one sense he calls the world the city of God, as having received the whole cup of the divine draught, and being gladdened thereby, so as to have derived from it an imperishable joy, of which it cannot be deprived for ever. But in another sense he applies this title to the soul of the wise man, in which God is said also to walk, as if in a city, "For," says God, "I will walk in you, and I will be your God in you." [*](Leviticus xxvi. 12. )