Board Thread:Lore Discussion/@comment-4840601-20140825201737/@comment-72.224.36.209-20140825203000

"The Mnemoli? They're the keepers of the Elder Scrolls. They cannot be fixed until seen. And they cannot be seen until a moment. And you, your hero, makes that moment."

-http://www.imperial-library.info/content/michael-kirkbride-irc-qa-sessions

Elder Scrolls aren't prophetic, they just appear to be because they exist outside of time. Elder Scrolls see all events of time at once, every once and a while they come across something interesting in time and record that event. Basically, the reason for the jombled mess of Elder Scrolls prophecies in Skyrim is because the Dovahkiin is a badass.