How we cite our quotes: (Chapter.Paragraph)
Quote #1
In fact, the Perimeter was much more successful in keeping people from Ancelstierre out of the Old Kingdom, than it was in preventing things from the Old Kingdom going the other way. Anything powerful enough to cross the Wall usually retained enough magic to assume the shape of a soldier; or to become invisible and simply go where it willed […]. (2.2)
The supernatural works in unusual ways in Sabriel's world, and here's an example: Magic functions in the Old Kingdom, but not in Ancelstierre. That makes the Wall a pretty strange place.
Quote #2
Here, she could feel magic potential brewing, lurking in the atmosphere like charged air before a thunderstorm. (2.4)
Magic, in Sabriel's world, is a force that she can feel, and this is a great description of what that feeling is like.
Quote #3
In his face, Sabriel suddenly realized what it meant to use magic on the Perimeter, and she held herself absolutely still, blanking out the partly made signs in her mind. (2.33)
In a world that has a clear, physical wall dividing magic and technology, Sabriel is just starting to understand the subtleties of the transition between the supernatural and the natural worlds.