It's an old magical principle - it's even filtered down into RPG systems - that magic, while taking a lot of effort, can be 'stored' - in a staff, for example. No doubt a wizard spends a little time each day charging up his staff, although you go blind if you do it too much, of course.
Terry PratchettWhen people say "clearly" something that means there's a huge crack in their argument and they know things aren't clear at all.
Terry PratchettThe pen is mightier than the sword ... if the sword is very short, and the pen is very sharp.
Terry Pratchett