"Why do you go away? So that you can come back. So that you can see the place you came from with new eyes and extra colors. And the people there see you differently, too. Coming back to where you started is not the same as never leaving."
― Terry Pratchett, A Hat Full of Sky 

"Don't wish, Miss Tick had said. Do things."
― Terry Pratchett 

"HUMANS NEED FANTASY TO BE HUMAN. TO BE THE PLACE WHERE THE FALLING ANGEL MEETS THE RISING APE." Or, from the very next page, "YOU NEED TO BELIEVE IN THINGS THAT AREN'T TRUE. HOW ELSE CAN THEY BECOME?"
― Terry Pratchett

"She knew a cutting, incisive, withering and above all a self-evident answer existed. It was just that, to her extreme annoyance, she couldn't quite bring it to mind."
― Terry Pratchett, Equal Rites 

"Granny's implicit belief that everything should get out of her way extended to other witches, very tall trees and, on occasion, mountains."
― Terry Pratchett, Wyrd Sisters 

I'm lazy so I'm coming back to add more quotes later. Yes, they will probably be from Terry Pratchett. You can probably guess who my favorite author is.