Humans Can Think Inhuman Thoughts.

I Think That Sick People In Ankh-morpork Generally Go To A Vet. It's Generally A Better Bet. There's More Pressure On A Vet To Get It Right. People Say "it Was God's Will" When Granny Dies, But They Get Angry When They Lose A Cow.

... When Your Name Is Really And Truly Percy Blakeney, Pronounced 'black-knee', And You Still Have Bad Acne In Your Twenties, You Accept Pimple As A Nickname And Are Grateful That It Wasn't Anything Worse.

You Haven't Really Been Anywhere Until You've Got Back Home.

One Day I'll Be Dead And Then You'll All Be Sorry.

I Would Not Like It Thought That I Do Not Buy My Own Paperclips, Sir. I Enjoy Owning My Own Paperclips. It Means They Are Mine.