Perhaps in that she is a treasure, but in truth she has had a little help. She does her best not to use the strange, inexplicable power, has in fact not used it for years. But just knowing it is there, to protect her in its haphazard, sometimes dangerous way, allows her to feel a greater freedom. Thus she can maintain some of the childlike innocence that endears her to those few that take the time to get to know a mousy spinster schoolteacher.

For books are not absolutely dead things, but... do preserve as in a vial the purest efficacy and extraction of that living intellect that bred them. I know they are as lively, and as vigorously productive, as those fabulous Dragon's teeth; and being sown up and down, may chance to spring up armed men. And yet on the other hand unless warriors be used, as good almost kill a Man a good Book; who kills a man kills a reasonable creature, God's image; but he who destroys a good book, kills Reason itself, kills the Image of God, as it were in the eye. Many a man lives a burden to the Earth; but a good Book is the precious life-blood of a master-spirit, embalmed and treasured up on purpose to a life beyond life.
-John Milton "Areopagitica"-