We're on a mission from Glod.
Some people think this is paranoia, but it isn't. Paranoids only think everyone is out to get them. Wizards know it.
The words are easy - most of them have already been invented.
People's whole lives do pass in front of their eye before they die. The process is called "Living".
You know, you're rather amusingly wrong.
Of course, Ankh-Morpork's citizens had always claimed that the river water was incredibly pure. Any water that had passed through so many kidneys, they reasoned, had to be very pure indeed.