User blog comment:Madman97/The Jyggalag Theory and the Elder Scrolls/@comment-1738746-20150514095345/@comment-11345660-20150519070947

Those are very interesting ideas, and places further emphasis on the relationship between the gods and the mere mortals below, though I do think it is rather doubtful Vyrthur was able to travel through time. His culture merely revolved around Akatosh, but there is no record they themselves could ever actually tell the future....unless....

Do you remember the quest in which the dragonborn had to look into the past to find the shout capable of grounding a dragon, and how Alduin was himself banished to the future? What if the same could be done but reversed. You could look into the future? Perhaps Akatosh and the scrolls are more closely connected than  had previousy thought. Or possibly, Jyggalag and Akatosh. He already determines events through the use of a complicated algorithm, so what if looking into events wasn't actually transporting your sight to the actual past or future, but a projection of the solution the algorithm determined from the scrolls themselves. Seeing things while reading the scrolls are nothing new, and perhaps it depends upon the person reading them what visions they see. I would imagine lesser readers: Moth priests, being able to see only smidgens of things, whereas the dragonborn (possiboy Vythut) can witness an entire event.

I think that would explain any account of fortune telling there. As for the Moth Priests not worshipping Akatosh, more information is needed on just who exactly they serve before making an accurate assumption, and Jyggalag seems unlikely given the time frame in which he was actually active and the time of the Moth Priests's creation. No one seems to have heard of Jyggalag (The name isn't in the Book of Daedra during the Oblivion or Skyrim days), anyway.