[I am also doing it because I am expecting a guest to arrive shortly. This should enable me to show the man the sort of hospitality he deserves, while doing the same for you.
My apartment doesn't have a doorbell. Why would an omniscient fellow need to be alerted to the presence of a visitor? I know he will be right on time. Which is to say, early. And if I did have a doorbell, you would have just witnessed it ring.
He is already here.]