both teaches us in her oracular utterances concerning those that are called gods, that they have no existence; and also clearly and manifestly prophesies concerning the predicted advent of our Saviour Jesus Christ, and concerning all those things which were to be done by Him. For the knowledge of these things will constitute your necessary preparatory training for the study of the prophecies of the sacred writers. And if any one supposes that he has learned the doctrine concerning God from the most ancient of those whom you name philosophers, let him listen to Ammon and Mercury: to Ammon, who in his discourse concerning God calls Him wholly hidden; and to Mercury, who says plainly and distinctly, "that it is difficult to comprehend God, and that it is impossible even for the man who can comprehend Him to declare Him to others." From every point of view, therefore, it must be seen that in no other way than only from the prophets who teach us by divine inspiration, is it at all possible to learn anything concerning God and the true religion.
