TES's universe is a dream of Godhead. That's why there's someone like Tiber Septim, Vivec etc achived what's called CHIM. You realize if you are nothing but a dream-thing inside Godhead. You are not exist but exist in this dream (Zero Sum), then you can do Lucid Dream things in Aurbis and manipulate anything/everything as you will. But if the Godhead realize it, he/she then "wakes up" then the TES's universe will be collapse without the next Kalpa.
So what/who exactly is Godhead? I read somewhere (I forgot where) there's something higher than CHIM... So you basically become the Godhead itself but awere if you're just dreaming, so you can do anything you please inside your own "universe" without afraid awekening the original-unaware Godhead. I forgot what is it called...