Let's pretend there's a way of getting through into it, somehow, Kitty. Let's pretend the glass has got all soft like gauze, so that we can get through. Why, it's turning into a sort of mist now, I declare! It'll be easy enough to get through . . . . And certainly the glass WAS beginning to melt away, just like a bright silvery mist.
~Lewis Carroll, Through The Looking-Glass