There are other ways a theologian could put this, but the one you mention is my favorite because of its absurdity. If god is affecting equally all times, he can't switch on and off, which leads us to two conclusions:

1. There's no reciprocity between him and the universe - no prayer answered, no miracle done.
2. Better still, if he's permanent creation, then he could not have not created the universe. His existence would be necessarily tied to the creation of the universe, and thus the universe would be as much an absolute as himself. He would not be all that transcendent, then, would he?