Marcus Tullius Cicero,
On Divination — Book 1
“ Are we to wait till the Gods are conversant with us and our affairs, while we are in the forum, and on our journeys, and when we are at home? yet though they do not openly discover themselves to us, they diffuse their divine influence far and wide—an influence which they not only inclise in the caverns of the earth, but sometimes extend to the constitutions of men. For it was this divine influence of the earth which inspired Pythia at Delphi, while the Sibyl received her power of divination from nature. ”
