Given enough coffee I could rule the world

That's a nice song,' said young Sam, and Vimes remembered that he was hearing it for the first time. It's an old soldiers' song,' he said. Really, sarge? But it's about angels.' Yes, thought Vimes, and it's amazing what bits those angels cause to rise up as the song progresses. It's a real soldiers' song: sentimental, with dirty bits. As I recall, they used to sing it after battles,’ he said. 'I've seen old men cry when they sing it,’ he added. Why? It sounds cheerful.' They were remembering who they were not singing it with, thought Vimes. You'll learn. I know you will.

Just because something is a metaphor doesn't mean it can't be real.

"Multiple exclamation marks," he went on, shaking his head, "are a sure sign of a diseased mind."

Coffee is a way of stealing time that should by rights belong to your older self.

If you have let pride get the better of you, then you have already lost, but if you grab pride by the scruff of the neck and ride it like a stallion, then you may have already won.

"There's a door," he whispered. "Where does it go?" "It stays where it is, I think," said Rincewind.