"Many things are going on. One of them is that I'm summoning you from a different universe than the one you're used to - if it's 2159 or 1995 where you're from, you're probably from a world I've at least heard of, but I've heard of two separate such worlds so it's not out of the question that there might be more. Another is that it has been decided by... let's call it an extremely informal interdimensional security council... that letting any daeva know about the existence of worlds beyond their current reach is to be stringently avoided on the grounds of potentially apocalyptic consequences. I'm sure I don't have to draw you a picture."