After these statements, Celsus, from a secret desire to cast discredit upon the Mosaic account of the creation, which teaches that the world is not yet ten thousand years old, but very much under that, while concealing his wish, intimates his agreement with those who hold that the world is uncreated. For, maintaining that there have been, from all eternity, many conflagrations and many deluges, and that the flood which lately took place in the time of Deucalion is comparatively modern, he clearly demonstrates to those who are able to understand him, that, in his opinion, the world was uncreated.
But let this assailant of the Christian faith tell us by what arguments he was compelled to accept the statement that there have been many conflagrations and many cataclysms, and that the flood which occurred in the time of Deucalion, and the conflagration in that of Phæthon, were more recent than any others. And if he should put forward the dialogues of Plato (as evidence) on these subjects, we shall say to him that it is allowable for us also to believe that there resided in the pure and pious soul of Moses, who ascended above all created things, and united himself to the Creator of the universe, and who made known divine things with far greater clearness than Plato, or those other wise men (who lived) among the Greeks and Romans, a spirit which was divine.
And if he demands of us our reasons for such a belief, let him first give grounds for his own unsupported assertions, and then we shall show that this view of ours is the correct one.
Source: Against Celsus (New Advent)