should the one be preferred to the other, and hence there are not many things which are unbegotten: for if there were some difference between them, you would not discover the cause of the difference, though you searched for it; but after letting the mind ever wander to infinity, you would at length, wearied out, take your stand on one Unbegotten, and say that this is the Cause of all. Did such escape the observation of Plato and Pythagoras, those 198 wise men,’ I said, ‘who have been as a wall and fortress of philosophy to us?’ 529 Chapter V.—The soul is not in its own nature immortal.