“Over the years, a huge number of theological man-hours have been spent debating the question: “How many angels can dance on the head of a pin?” To answer it, we need information.

Firstly, angels don’t dance. It’s one of the distinguishing characteristics that marks an angel. So, none.

At least, nearly none. Aziraphale had learned a dance called the “gavotte” in a discreet gentlemen’s club in Portland Place in the late 1880s. After a while, he had become fairly good at it, and was quite put out when, some decades later, the gavotte went out of style for good. So providing the dance was a gavotte, the answer is a straightforward “one”.

Then again, you might just as well ask how many demons can dance on the head of a pin. They’re of the same original stock, after all. And at least demons dance. Not what you’d call good dancing, though.

For demons or for angels, size and shape are simply options.

So, if you look from really close up, the only problem about dancing on the head of a pin is all those big gaps between electrons.“