“Filif had slipped out of his ornaments again for a little while and was looming over this discussion with some confusion. But apparently the G force became too much for him. “It’s very nice as a physical-universe explanation,” Filif said, “but of course the methodology’s completely flawed.”
Dairine peered up at him. “What?”
“Well, since this is being is plainly one of the Powers, if a bit of an anarchic or chaotic one,” Filif said, “why are you trying to solve this problem inside a single dimension? It doesn’t work. A dimensionally transcendent being like one of the Powers would hardly limit itself to functioning in only three or four dimensions. The evidence clearly indicates someone working in six or better. See, the temporal element-“
…
“- but once you’re in the six-and-up, millions of apparent visits to physical reality per second is no great problem. It’s only inside the orthogonal plane of time that everything seems to be happening amazingly fast. But if you’re one of the Powers, there’s not the slightest rush. You slide sidewise into the applicable orthotemporal dimension, just that one, mind you, and then you drop off whatever playthings are required to make a drop. And then you pull out again and restock at your leisure, and then dip into that timeplane again. When you’re in D7 or thereabouts, the temporality of D3 and D4 is hardly an issue…”
“That’s it,” Ronan said, “he’s solved Santa. We have nothing left to live for.”
— "How Lovely are Thy Branches," by Diane Duane