the point of CHIM is to do stuff. vehk used it to [censored] azura in the mouth, talos used to to retcon joungle... CHIM gives you the ability to edit the world of possibility because you are that world.
you, as god, are asleep. the world is your dream and therefore it and everything in it is you. if you realize that you are dreaming without waking up you can change the course of your dream.
Ooooh, I like this explanation.
I like the dream anology; I've had dreams like that, where I realize I can undo a mistake or something... but I haven't woken up, thought to myself "hmm, I wish I hadn't fallen off that cliff," gone back to sleep, and then re-thought the whole dream scenario again... Except, I suppose in the case of CHIM, you can move mountains because they are you.
Woah... so, is Vehk more powerful than the Daedra? Or, is his influence to Daedra-mouth-eff only limited to beings (such as Daedra) that come into the influence of Mundus. In other words, Vivec might not have been able to do those unmentionable things to Azura had he attempted to execute them in
her realm. So, is the power of CHIM limited to the Mundus/Nirn?