“You couldn't unburn the books. You could only buy new ones.”

“Harry: This book belongs to Harry Potter. Ron: Shared by Ron Weasley, because his fell apart. Hermione: Why don't you buy a new one then? Ron: Write on your own book, Hermione. Hermione: You bought all those dungbombs on Saturday. You could have bought a new book instead. Ron: Dungbombs rule.”

“Buying books would be a good thing if one could also buy the time to read them; but as a rule the purchase of books is mistaken for the appropriation of their contents.”

“No. I'm not buying a shirt."I could buy you a shirt."I don't need you to buy me a shirt."Mercedes pulled him over to the nice GQ-dude who worked the department. "Tell him he needs a new shirt."I don't need a new shirt."Sir, you need a new shirt.”

“You couldn't change a river into a sea, but you could trace a new channel for it to follow.”

“Wear the old coat and buy the new book.”