It appears that I, too, have been bitten by the Harry Potter craze. But gee, they're just damn good stories!
But to the point. I love this spell. It means, "I expect a protector". The charm wards off the dementors by summoning a Patronus, a spirit of protection. It only works, however, with a great amount of concentration on a happy thought.
Which is a little like faith. You see, I think one of the most obvious reasons Christians choose not to be pacifists is because they are afraid. Afraid of what humans might do. How odd, though, that they also choose to place their faith in human weapons to protect them. Why fear those who have the power only to kill the body? Should we not rather fear God, who can destroy both body and soul? And should we not rather trust him, who can restore life to both body and soul? And not only this, but can he not convert the hearts of our enemies, as he did our own?
Millions of Christians have prayed this prayer from the Book of Common Prayer. I wonder how many really believe it will be answered.
"O God, from all holy desires, all good counsels, and all just works do proceed; Give unto thy servants that peace which the world cannot give; that our hearts may be set to obey thy commandments, and also that by thee, we, being defended from the fear of our enemies, may pass our time in rest and quietness; through the merits of Jesus Christ our Saviour. Amen."