The whole series is about the loss of innocence, ... In the first one ['The Sorcerer's Stone'], everyone's very wide-eyed, almost na•ve. Harry's thinking that because he's entering a magical world, it's got to be better than the world he's come from. But it's not it's just got further extremes. It can have extreme joy, but there are also the depths that man can sink to.  -   Daniel Radcliffe     Quotes
The whole series is about the loss of innocence, ... In the first one ['The Sorcerer's Stone'], everyone's very wide-eyed, almost na•ve. Harry's thinking that because he's entering a magical world, it's got to be better than the world he's come from. But it's not it's just got further extremes. It can have extreme joy, but there are also the depths that man can sink to. Daniel Radcliffe