Regular

terrypratchettparadise:

““Magic uses people,” said Rincewind hurriedly. “It affects you as much as you affect it, sort of thing. You can’t mess around with magical things without it affecting you. I just thought I’d better warn you.” “Like a wine bottle,” said Creosote, “that -” “- drinks you back,” said Rincewind.””

— Terry Pratchett – Sourcery